Lancet-integrated sensor, measurer for lancet-integrated sensor, and catridgeAbstract Claims 2. A lancet-integrated sensor as defined in claim 1, wherein the sensor body has an internal space through which the lancet can pass, and holds the lancet in the space. 3. A lancet-integrated sensor as defined in claim 2, wherein a long and narrow space for housing the lancet is formed in the sensor body. 4. A lancet-integrated sensor as defined in any of claims 1 to 3, wherein the sensor body is obtained by bonding two thin plates together, and at least one of the two plates has a concave portion; and the lancet is stored in a space which is formed by the concave portion of the two plates bonded together. 5. A lancet-integrated sensor as defined in any of claims 1 to 4, wherein when the lancet lances the skin to extract the bodily fluid, the lancet projects its needle tip from the inside of the sensor body in which the lancet is stored. 6. A lancet-integrated sensor as defined in any of claims 1 to 5, wherein a cavity for collecting the bodily fluid is provided separately from the space in the sensor body where the lancet is housed. 7. A lancet-integrated sensor as defined in any of claims 1 to 6, wherein the space in the sensor body for housing the lancet also serves as a cavity for collecting the bodily fluid; and the bodily fluid is collected into the space for housing the lancet. 8. A lancet-integrated sensor as defined in any of claims 1 to 6, wherein an inlet of a cavity for collecting the bodily fluid is provided at an end of the sensor from which the needle tip of the lancet is projected. 9. A lancet-integrated sensor as defined in any of claims 1 to 8, wherein the sensor body has, in-a cavity, an electrode for outputting the analysis result of the characteristics of the bodily fluid. 10. A lancet-integrated sensor as defined in claim 9, wherein a connection terminal to be connected with an external measuring device to electrically measure the characteristics of the bodily fluid is provided at an end of the sensor body having the cavity. 11. A lancet-integrated sensor as defined in any of claims 1 to 10, wherein a reagent that reacts with the collected bodily fluid is provided in the cavity. 12. A lancet-integrated sensor as defined in any of claims 1 to 10, wherein an end of the lancet on the side opposite to the needle tip projects from the sensor body; and the projecting end is engaged with a driving means of the external measuring device, whereby the lancet is driven to perform the skin lancing operation. 13. A lancet-integrated sensor as defined in claim 12, wherein a connector to be engaged with the driving means of the external measuring device is provided at the end of the lancet on the opposite side to the needle tip; and the connector is engaged with the driving means, whereby the lancet performs the skin lancing operation. 14. A lancet-integrated sensor as defined in claim 13, wherein the connector is made of a resin, and has a diameter larger than that of the lancet. 15. A lancet-integrated sensor as defined in any of claims 1 to 14, wherein a detachable protection cover is-fitted to the needle tip of the lancet; and the protection cover is removed during the skin lancing operation of the lancet. 16. A lancet-integrated sensor as defined in claim 15, wherein the protection cover has a tube part for housing the needle tip in it, and a wide grip part for facilitating removal of the protection cover from the lancet, which grip part is provided on the needle tip side of the tube part. 17. A lancet-integrated sensor as defined in claim 15, wherein engagement of the lancet and the driving means, and attachment of the sensor body integrated with the lancet to the measuring device are performed with holding the grip part of the protection cover. 18. A lancet-integrated sensor as defined in claim 16, wherein a space in which the front end of the sensor body can be housed is formed in the tube part. 19. A lancet-integrated sensor as defined in any of claims 1 to 18 being provided with a holder which covers the periphery of the integrated sensor body and lancet to hold them. 20. A lancet-integrated sensor as defined in claim 19, wherein the holder is made of a transparent material. 21. A lancet-integrated sensor as defined in any of claims 1 to 20 being of a disposal type, which will be discarded after performing collection and analysis of the bodily blood one time. 22. A measuring device to which a lancet-integrated sensor that is constituted by integrating a lancet for lancing the skin of a subject to extract its bodily fluid, and a sensor body for analyzing the extracted bodily fluid, is detachably attached, for measuring the characteristics of the bodily fluid collected by the lancet-integrated sensor, said measuring device including: a lancet driving means for driving, after the lancet-integrated sensor is attached to the measuring device, the lancet so as to lance the skin. 23. A measuring device as defined in claim 22, wherein at least one end of the lancet-integrated sensor is projected from the measuring device when attachment of the lancet-integrated sensor to the measuring device is completed. 24. A measuring device as defined in claim 22 or 23, wherein the lancet driving means drives the lancet of the lancet-integrated sensor so that the needle tip of the lancet is projected from the sensor only when it lances the skin to collect the bodily fluid and, at all other times, the needle tip is housed in the sensor. 25. A measuring device as defined in claim 24 being provided with a connector for maintaining electrical connection with an electrode terminal that is placed at an end of the sensor body of the lancet-integrated sensor, to measure the characteristics of the collected bodily fluid by an internal electric circuit. 26. A measuring device as defined in any of claims 22 to 25, wherein the lancet driving means drives the lancet when it is engaged with an end of the lancet on the opposite side to the needle tip, or when a grip part of a protection cover is griped. 27. A measuring device as defined in claim 26, wherein the lancet driving means has a spring for applying a force to the lancet in the longitudinal direction of the sensor, and the force of the spring is released by a press button that is provided on the measuring device to project the lancet. 28. A measuring device as defined in any of claims 21 to 27, wherein a lancet-integrated sensor as defined in any of claims 15 to 18 is detachably attached to the measuring device; and attachment of the lancet-integrated sensor to the measuring device is carried out with the tip of the lancet being covered with a protection cover, the sensor is held by the connector of the measuring device, and an end of the lancet on the opposite side to the needle tip is supported by the lancet driving means. 29. A measuring device as defined in any of claims 22 to 28, wherein a lancet-integrated sensor as defined in any of claims 19 to 20 is detachably attached to the measuring device; and the sensor is held by the connector, and an end of the lancet on the opposite side to the needle tip or the grip part of the protection cover is held by the driving means, in accordance with the operation of engaging the holder with the measuring device, so that the sensor and the lancet are attached to the measuring device in the state where the sensor and the lancet are being held by the holder. 30. A measuring device as defined in any of claims 22 to 29, wherein a lancet-integrated sensor which has been used is ejected from the measuring device body without being touched with hands, by operating an operation button that is provided on the measuring device body. 31. A measuring device as defined in any of claims 22 to 30, wherein the amount of projection of the needle tip of the lancet from the front end of the sensor is displayed on a display means that is provided on the measuring device body. 32. A lancet-integrated sensor which is constituted by integrating a lancet having a needle for lancing skin to collect bodily fluid, and a sensor for analyzing the collected bodily fluid, wherein a cavity for slidably housing a part of the lancet is formed in the sensor; and a force is applied to the lancet in a direction opposite to the direction along which the needle lances the skin, to house the needle in the sensor, whereby the lance and the sensor are locked with each other. 33. A lancet-integrated sensor as defined in claim 32, wherein the lancet comprises an approximately-rectangle-shaped plate member; the needle of the lancet is arranged in the vicinity of the center of one of the shorter sides of the plate member so that it projects along the longitudinal direction of the plate member; the cavity is formed in a shape approximately identical to an outline shape that is obtained when the lancet is slid by a predetermined amount along the longitudinal direction thereof; and openings for projecting the needle and the other side of the lancet to the outside of the sensor are formed at the front end and the rear end of the sensor, respectively. 34. A lancet-integrated sensor as defined in claim 32 or 33, wherein either a convex portion for locking or a concave portion for locking is formed on the lancet, and either a concave portion for locking or a convex portion for locking which is engaged with the convex portion or the concave portion of the lancet is formed on the sensor; and the lancet and the sensor are locked with each other when the convex portion for locking and the concave portion for locking are engaged with each other. 35. A lancet-integrated sensor as defined in claim 34, wherein the lancet has two plate-shaped projections which project from the two longer sides of the lancet in the width direction; the projections have the concave portions for locking on their upper surfaces; a cavity for slidably housing the lancet, which is formed in the sensor, has two depressions for housing the two projections of the lancet, which depressions project in the width direction of the cavity; and the depressions have the concave portions for locking at their ceilings. 36. A measuring device for performing measurement using a lancet-integrated sensor as defined in claim 33, comprising: a guide member for guiding the lancet-integrated sensor that is inserted from an opening provided on a side surface of the measuring device, thereby restricting the direction along which the lancet-integrated sensor travels in the measuring device; a lancet pressing member which is pushed by a spring member in the measuring device in a direction opposite to the direction along which the lancet-integrated sensor is inserted, and is engaged with the other shorter side of the lancet that is guided toward the inside of the measuring device by the guide member, thereby pressing the lancet toward the opening; a locking member for fixing the lancet pressing member at a predetermined position in the measuring device when the lancet-integrated sensor is inserted deeper into the measuring device; an unlocking member for releasing fixation of the lancet pressing member by the locking member, with manual operation; and an ejection member for applying a force to the sensor of the lancet-integrated sensor to push the sensor toward the opening side, with manual operation, which ejection member is provided between the lancet pressing member-and the guide member. 37. A measuring device for a lancet-integrated sensor as defined in claim 36, wherein the ejection member slides an operation lever that is exposed at the main surface of the measuring device, toward the opening side, whereby a pressing member that is united with the operation lever presses the vicinity of both sides of an end of the lancet-integrated sensor, which end is opposite to the side where the lancet lances the skin, thereby ejecting the lancet-integrated sensor. 38. A measuring device for performing measurement using a lancet-integrated sensor which is constituted by integrating a lancet for lancing skin to collect bodily fluid, and a sensor for analyzing the collected bodily fluid, wherein the measuring device for the lancet-integrated sensor has an opening on a side surface; the measuring device has a cavity in which the lancet-integrated sensor can be housed, which cavity is formed corresponding to the opening; a holder attachment part is formed on the side of the measuring device having the opening, which holder attachment part detachably attaches a holder body in which the lancet-integrated sensor can path through, to the measuring device; and the holder body guides the lancet-integrated sensor-when the lancet-integrated sensor is housed in the cavity and, after it is housed in the cavity, the holder body holds a portion of the lancet-integrated sensor in the vicinity of the end where the lancet lances the skin. 39. A measuring device for a lancet-integrated sensor as defined in claim 38, wherein engagement portions of the holder and the holder attachment part have asymmetrical shapes in the vertical direction or in the horizontal direction; and attachment of the holder to the holder attachment part is possible only when the vertical direction of the holder with respective to the holder attachment part is a predetermined direction. 40. A measuring device for a lancet-integrated sensor as defined in claim 38, wherein the opening of the holder attachment part into which the holder body is inserted has a shape of an approximately rectangle that is side-to-side long, with portions corresponding to the corners of the rectangle being rounded, and the opening has smaller openings overhanging in the width direction in the vicinities of the centers of two sides in the longitudinal direction. 41. A measuring device for a lancet-integrated-sensor as defined in claim 40, wherein the holder body has hinge-shaped stoppers; inner sides of the hinge-shaped stoppers are fixed to the holder body; and outer sides of the hinge-shaped stoppers are engaged with the engagement portions of the holder attachment part. 42. A measuring device for a lancet-integrated sensor as defined in claim 40, wherein the holder body has a peripheral edge part that extends along the surface of the opening, at the periphery of the opening excluding the smaller openings, on the side where the holder body is attached to the measuring device; the hinge-shaped stoppers are provided in portions of the peripheral edge part corresponding to the smaller openings; and the hinge-shaped stoppers are obtained by extending band-shaped elastic members in the direction along which the lancet-integrated sensor is impacted into the holder body, and bending the elastic members outward at 180.degree.. 43. A measuring device for a lancet-integrated sensor as defined in claim 42, wherein each of the hinge-shaped stoppers has a clip member at the front end of the band-shaped elastic member, which clip member is thicker than the elastic member, and performs positioning when the holder body is latched in the opening. 44. A biosensor cartridge for housing plural biosensors, each having a reagent layer for detecting a specific component in bodily fluid of a subject, and an electrode for taking out an electric signal indicating that the reagent layer detects the specific component, wherein a cartridge body has, at an end of its upper surface, a hinge for rotatably fixing a lid that covers the cartridge; the cartridge body has plural slits for perpendicularly supporting the respective biosensors; and the plural slits are formed in parallel with each other, from the upper surface toward the lower surface of the cartridge body, at regular intervals which allow an insertion slot of a measuring device for performing measurement using a target biosensor to be inserted without touching biosensors adjacent to the target biosensor. 45. A biosensor cartridge as defined in claim 44, wherein the cartridge body to which the lid is attached is a rectangular parallelepiped in shape. 46. A biosensor cartridge as defined in claim 45, wherein the lid is a hollow rectangular parallelepiped in shape, and has an opening at a portion opposed to the upper surface of the cartridge body. 47. A biosensor cartridge as defined in claim 44, wherein the bottom of each slit has a shape that conforms to the shape of the front end of the biosensor. 48. A biosensor cartridge as defined in claim 47, wherein the front end of the biosensor is semi-circular in shape. 49. A biosensor cartridge as defined in claim 44, wherein the hinge is constituted by a pair of bearings each having a side-to-side long bearing hole that projects outward along the longitudinal direction of the cartridge body from an end of the upper surface of the cartridge body, and a pair of axial projections which are provided at an end of the lid, and serve as fulcra when being smooth-movably engaged with the bearings to rotate the lid; a peripheral edge part is formed at the periphery of the upper surface of the cartridge body, which part extends in a direction perpendicular to the side walls of the cartridge body, and has plural notches; reverse-L-shaped projections are formed on the same plane as the side walls of the lid, in positions corresponding to-the notches of the peripheral edge part, at the periphery of the opening of the lid; and a sealing member having elasticity is formed on the upper surface of the peripheral edge part. 50. A biosensor cartridge for housing plural lancet-integrated biosensors, each being constituted by integrating a biosensor having a reagent layer for detecting a specific component in bodily fluid of a subject, and an electrode for taking out an electric signal indicating that the reagent layer detects the specific component, with a lancet for collecting the bodily fluid of the subject, wherein the cartridge body has, at an end of its upper surface, a hinge for rotatably fixing a lid that covers the cartridge body; the cartridge body has plural grooves for perpendicularly supporting the lancet-integrated biosensors; and the plural grooves are formed in parallel with each other, from the upper surface toward the lower surface of the cartridge body, at regular intervals which allow an insertion slot of a measuring device for performing measurement using a target biosensor to be inserted without touching biosensors adjacent to the target biosensor. 51. A biosensor cartridge as defined in claim 50, wherein the lancet-integrated biosensor includes an approximately-square-shaped and narrow protector for protecting the lancet that projects from the lancet-integrated biosensor in its unused state, a sensor body in which the lancet is smooth-movably housed, the sensor body being approximately rectangle in shape, has a front end being semi-circular in shape, and is a little wider than the protector, and a connector which is provided on the lancet, protrudes backward from the sensor body, and has a width approximately equal to the width of the sensor body; wherein each of the plural grooves comprises a narrow first groove which is provided at the lowest surface side of the cartridge body, and conforms to the shape of the protector, a second groove which is wider than the first groove, is provided above the first groove, and conforms to the shape of a portion of the sensor body, and a third groove which is wider than the second groove, is provided above the second groove, and conforms to the shape of the insertion slot part of the measuring device into which the sensor body is inserted. 52. A biosensor cartridge as defined in claim 51, wherein the insertion slot stores the sensor body into a cavity which penetrates a pillar-shaped projection that projects from a side surface of the measuring device; and the connector is stored in the cavity that extends into the measuring device. 53. A measuring device for performing measurement using a lancet-integrated sensor that is attached thereto, said lancet-integrated sensor being constituted by integrating a lancet for lancing skin to collect bodily fluid, and a sensor for analyzing the extracted bodily fluid, said measuring device including: a drive means for driving the lancet in a direction in which the lancet lances the skin, along the longitudinal direction of the sensor, from the standby position of the lancet; wherein, after the drive means has driven the lancet in the direction in which the lancet lances the skin, the drive means can drive the lancet back to the standby position while maintaining the state where the lancet-integrated sensor is attached to the measuring device. 54. A measuring device for a lancet-integrated sensor as defined in claim 53, wherein the drive means has a shaft to which a connector receiver is fixed at an end on the side where the lancet lances the skin, which connector receiver receives an end of the lancet on the side opposite to the side where the lancet lances the skin; a pull stick for driving the lancet back in a direction opposite to the direction in which the lancet lances the skin is disposed on an end of the shaft on the side opposite to the side where the lancet lances the skin; and the connector receiver is provided with a claw portion which is unlocked by pressing an operation button to start the operation of the drive means, and stops the motion of the connector receiver against a force applied by a spring that is provided on the shaft to move the connector receiver in the direction in which the lancet lances the skin. 55. A measuring device for a lancet-integrated sensor as defined in claim 54, wherein the measuring device has, in its internal cavity, a support member for slidably supporting the shaft in the vicinity of its center; and the spring is a coil spring which is placed between the support member of the shaft and the connector receiver. 56. A measuring device for a lancet-integrated sensor as defined in claim 54, wherein the pull stick has an opening which is formed at an end of the side where the lancet lances the skin; an end of the shaft on the side opposite to the side where the lancet lances the skin is slidably housed in the pull stick through the opening; and the end of the shaft on the side opposite to the side where the lancet lances the skin has a slip-out prevention member for preventing the end of the shaft to slipping out of the pull stick toward the side where the lancet lances the skin. 57. A measuring device for a lancet-integrated sensor as defined in claim 54, wherein the driving means is provided with a lancet projection amount adjuster for adjusting the amount of projection of the needle of the lancet that lances the skin, which driving means is placed between the measuring device and the pull stick. 58. A measuring device for a lancet-integrated sensor as defined in claim 57, wherein the pull stick is approximately cylindrical in shape, and an end of the pull stick on the side opposite to the side where the lancet lances the skin has a handle part having a portion of a diameter larger than the diameter of the cylindrical part; the lancet projection amount adjuster is approximately cylindrical in shape, and an end of the adjuster on the side opposite to the side where the lancet lances the skin has an opening having a diameter equal to the diameter of the cylindrical part of the pull stick; and the cylindrical part is slidably housed through the opening, and the cylindrical part is screwed into a screw hole that is formed on a side surface of the measuring device on the side opposite to the side where the lancet lances the skin, toward the inside of the measuring device, whereby the cylindrical part rotates in the screw direction or in the opposite direction to adjust the amount of projection of the lancet. Description [0001] The present invention relates to a lancet-integrated sensor for extracting bodily fluid of a man or an animal, and easily analyzing the characteristics of the bodily fluid and, more particularly, to an improved lancet-integrated sensor that is characterized by a construction in which a lancet for lancing skin to extract bodily fluid is integrated with a sensor for collecting the bodily fluid extracted at the surface of the skin to analyze it. [0002] Further, the present invention relates to a measuring device for measuring components of bodily fluid such as blood sugar and, more particularly, to an improved measuring device for a lancet-integrated sensor. [0003] Furthermore, the present invention relates to an improved cartridge for housing biosensors of this type. BACKGROUND ART [0004] Conventionally, as a device for easily analyzing the characteristics of bodily fluid of a man or an animal, for example, a device for electrochemically measuring blood sugar has already been put to practical use. [0005] A biosensor is a device of this type, and hereinafter, a biosensor and a measuring device to be combined with the biosensor will be described. [0006] FIG. 21 shows a long and narrow strip-shaped sensor 31 for collecting blood, which is set in a sensor insertion slot 31a of a measuring device 32. The sensor 31 is provided with a cavity (not shown) for collecting blood, in its semi-circular front end that protrudes from the measuring device 32 in the state where the sensor 31 is housed in the measuring device 32. Further, the sensor 31 is provided with, in the cavity, a reagent layer containing an enzyme, an electron carrier, and the like, and electrodes. [0007] The measuring device 32 contains an electric circuit for measuring a current value according to the concentration of glucose in blood, which current is generated by a reaction between the glucose in blood and the reagent layer, by applying a voltage to the electrode, and the measured blood sugar is displayed on a display 33 which is placed on the upper surface of the measuring device 32. [0008] For every measurement, a new sensor 31 is inserted into the sensor insertion slot on the side surface of the measuring device 32, and blood of a patient is applied onto the sensor 31 to perform measurement. The sensor 31 after measurement is discarded for hygienic reasons. [0009] Usually, the skin of a body part, such as a fingertip, is lanced with a lancet device 34 as shown in FIG. 22(a) to extract a very small quantity of blood, and the blood is collected in the cavity of the sensor 31. [0010] In the lancet device 34 whose internal structure is shown in FIG. 22(b), a force is elastically applied to a lancet 35 by a spring coil 36. When an operation button 37 is pushed, an engagement member 37a which is united with the operation button 37 is disengaged from a ring-shaped groove 35a of the lancet 35, whereby the force applied to the lancet 35 by the spring 36 is released, and the tip of a needle 35b of the lancet 35 forcibly projects from the front end of an approximately cylindrical-shaped case 38. The lancet 35 comprises the needle 35b which is made of metal, and a holder 35c for holding the needle 35b, which is made of plastic. Usually, the lancet 35 is replaced with a new one at every measurement, for hygienic reasons. [0011] Further, a biosensor to be used for analyzing bodily fluid extracted from a man or an animal is usually preserved in the state where it is wrapped with an aluminum wrapper or the like, or in the state where it is contained in a plastic case. When the biosensor is used, it is taken out of the aluminum wrapper or the plastic case. [0012] FIG. 23(a) is a diagram illustrating the state where a biosensor 110 having a reagent layer (not shown) for analyzing bodily fluid, and an electrode (not shown) for taking out an electric signal according to the result of analysis, is hermetically wrapped with an aluminum wrapper 120. To be specific, a biosensor 110 which comprises an approximately rectangle-shaped plate member having a shorter side of an approximately semi-circular shape is wrapped with an aluminum wrapper 120 having a rectangle shape that is a little larger than the biosensor 110. FIG. 23(b) shows the state where a plurality of biosensors 110, which are arranged with their approximately-semi-circular-shaped ends turning upward and their surfaces being in contact with each other, are hermetically contained in a cylindrical plastic case 130 with a lid. [0013] When performing measurement, the biosensor 110 which is preserved as shown in FIG. 23(a) or 23(b) is taken out, and the other shorter side of the biosensor 110, which is not the approximately-semi-circular-shaped side, is inserted in a biosensor insertion slot 114a of a measuring device 114 to prepare for measurement as shown in FIG. 24. [0014] Since the conventional biosensor and measuring device thereof are constructed as described above, when preparing for measurement, a patient sets a new lancet 35 in the lancet device 34 as described above. Then, the patient sets a new sensor 31 in the measuring device 32, whereby preparation for measurement is completed. Thereafter, the patient operates the lancet device 34 to take blood from his/her fingertip or the like, and applies it onto the front end of the sensor 31 that is set in the measuring device 32 to perform measurement. In this way, the patient must perform replacement of the lancet and replacement of the sensor separately for every measurement, resulting in complicated operation. [0015] Further, since it is necessary to monitor blood sugar a few times a day, the sizes of these devices are reduced in consideration of portability. In the conventional system, however, the patient must carry the sensor 31, the measuring device 32, the lancet 35, and the lancet device 34 together, resulting in a voluminous system as a whole. Further, since the patient must manage the sensor 31 and the lancet 35 separately, operation and measurement are troublesome, resulting in poor usability. [0016] The present invention is made to solve the above-mentioned problems and has for its object to provide a lancet-integrated sensor in which a sensor and a lancet are integrated to facilitate operation and management, and improve portability, as well as a measuring device to be combined with the lancet integrated sensor. [0017] Further, with respect to the conventional biosensors, as described above, each biosensor is wrapped with an aluminum wrapper, or plural biosensors are stored in a plastic case with a lid, whereby the biosensors are prevented from contamination due to moisture. [0018] However, when preparing for measurement, the patient must break the aluminum wrapper 120 to take the biosensor 110 or open the lid 130a of the plastic case 130 to take the biosensors 110 one by one. Further, the patient must insert the taken biosensor 110 toward the sensor insertion slot 114a of the measuring device 114. Therefore, preparation for measurement is troublesome, and the usability is poor. [0019] The present invention is made to solve the above-mentioned problems and has for its object to provide a biosensor cartridge by which a biosensor stored in a case is easily inserted into a measuring device without troublesome operation. DISCLOSURE OF THE INVENTION [0020] To be specific, in order to solve the above-mentioned conventional problems, a lancet-integrated sensor-according to claim 1 of the present invention is constituted by integrating a lancet for lancing the skin of a subject to extract its bodily fluid, and a sensor body for analyzing the extracted bodily fluid; the sensor body has a shape of a long and narrow strip; and the lancet is driven along the longitudinal direction of the sensor body by an external driving means, thereby lancing the skin. [0021] Accordingly, the sensor and the lancet are integrated with each other, whereby the sensor and the lancet can be managed not separately but together, resulting in easy handling. When measuring the bodily fluid, since the sensor and the lancet can be set as a single unit on a measuring device, the operability is improved. Further, the lancet-integrated sensor is convenient to carry about. Furthermore, since the lancet is movable along the longitudinal direction of the long and narrow strip-shaped sensor, the size of the lancet-integrated sensor is reduced, resulting in easy handling. [0022] Further, according to claim 2 of the present invention, in the lancet-integrated sensor defined in claim 1, the sensor body has an internal space through which the lancet can pass, and holds the lancet in the space. [0023] Accordingly, the lancet is held in the sensor, thereby providing a specific construction for further reducing the size of the lancet-integrated sensor. [0024] Further, according to claim 3 of the present invention, in the lancet-integrated sensor defined in claim 2, a long and narrow space for housing the lancet is formed in the sensor body. [0025] Accordingly, the long and narrow space facilitates positioning of the lancet and the sensor, whereby a space for attachment of the sensor and the lancet, and a space for moving the lancet can be secured. [0026] Further, according to claim 4 of the present invention, in the lancet-integrated sensor defined in any of claims 1 to 3, the sensor body is obtained by bonding two thin plates together, and at least one of the two plates has a concave portion; and the lancet is stored in a space which is formed by the concave portion of the two plates bonded together. [0027] Accordingly, a thinner lancet-integrated sensor can be provided. [0028] Further, according to claim 5 of the present invention, in the lancet-integrated sensor defined in any of claims 1 to 4, when the lancet lances the skin to extract the bodily fluid, the lancet projects its needle tip from the inside of the sensor body in which the lancet is stored. [0029] Accordingly, the needle tip of the lancet is housed in the sensor, whereby safely is further improved. [0030] Further, according to claim 6 of the present invention, in the lancet-integrated sensor defined in any of claims 1 to 5, a cavity for collecting the bodily fluid is provided separately from the space in the sensor body where the lancet is housed. [0031] Accordingly, the risk of damaging the inside of the cavity for collecting the bodily fluid by the lancet is avoided. [0032] Further, according to claim 7 of the present invention, in the lancet-integrated sensor defined in many of claims 1 to 6, the space in the sensor body for housing the lancet also serves as a cavity for collecting the bodily fluid; and the bodily fluid is collected into the space for housing the lancet. [0033] Accordingly, the bodily fluid is collected into the space where the lancet moves to lance the skin, whereby the size of the lancet-integrated sensor is further reduced. [0034] Further, according to claim 8 of the present invention, in the lancet-integrated sensor defined in any of claims 1 to 6, an inlet of a cavity for collecting the bodily fluid is provided at an end of the sensor from which the needle tip of the lancet is projected. [0035] Accordingly, the bodily fluid is stored in the cavity at the front end of the sensor from which the needle tip protrudes, whereby the time during which the collected bodily fluid is exposed to the air is minimized. [0036] Further, according to claim 9 of the present invention, in the lancet-integrated sensor defined in any of claims 1 to 8, the sensor body has, in a cavity, an electrode for outputting the analysis result of the characteristics of the bodily fluid. [0037] Accordingly, the characteristics of the bodily fluid can be electrically measured. [0038] Further, according to claim 10 of the-present invention, in the lancet-integrated sensor defined in claim 9, a connection terminal to be connected with an external measuring device to electrically measure the characteristics-of the bodily fluid is provided at an end of the sensor body having the cavity. [0039] Accordingly, the characteristics of the bodily fluid can be electrically measured by the external measuring device that is connected to the sensor. [0040] Further, according to claim 11 of the present invention, in the lancet-integrated sensor defined in any of claims 1 to 10, a reagent that reacts with the collected bodily fluid is provided in the cavity. [0041] Accordingly, the characteristics of the bodily fluid can be optically or electrochemically measured by a chemical reaction between the reagent and the bodily fluid. [0042] Further, according to claim 12 of the present invention, in the lancet-integrated sensor defined in any of claims 1 to 10, an end of the lancet on the side opposite to the needle tip projects from the sensor body; and the projecting end is engaged with a driving means of the external measuring device, whereby the lancet is driven to perform the skin lancing operation. [0043] Accordingly, the external driving means for driving the lancet can hold the base end of the lancet, and drive the lancet in the longitudinal direction of the sensor to make the lancet perform the lancing operation. [0044] Further, according to claim 13 of the present-invention, in the lancet-integrated sensor defined in claim 12, a connector to be engaged with the driving means of the external measuring device is provided at the end of the lancet on the opposite side to the needle tip; and the connector is engaged with the driving means, whereby the lancet performs the skin lancing operation. [0045] Accordingly, the external driving means for driving the lancet can easily hold the base end of the lancet to drive the lancet more reliably. [0046] Further, according to claim 14 of the present invention, in the lancet-integrated sensor defined in claim 13, the connector is made of a resin, and has a diameter larger than that of the lancet. [0047] Accordingly, the external driving means for driving the lancet can easily hold the base end of the lancet to drive the lancet more reliably. [0048] Further, according to claim 15 of the present invention, in the lancet-integrated sensor defined in any of claims 1 to 14, a detachable protection cover is fitted to the needle tip of the lancet; and the protection cover is removed during the skin lancing operation of the lancet. [0049] Accordingly, injury by the needle tip of the lancet, and contamination of the needle tip are avoided. [0050] Further, according to claim 16 of the present invention, in the lancet-integrated sensor defined in claim 15, the protection cover has a tube part for housing the needle tip in it, and a wide grip part for facilitating removal of the protection cover from the lancet, which grip part is provided on the needle tip side of the tube part. [0051] Accordingly, removal of the protection cover that covers the needle tip of the lancet is facilitated. [0052] Further, according to claim 17 of the present invention, in the lancet-integrated sensor defined in claim 15, engagement of the lancet and the driving means, and attachment of the sensor body integrated with the lancet to the measuring device are performed with holding the grip part of the protection cover. [0053] Accordingly, the user can attach the sensor and the lancet to the measuring device by griping the protection cover, without holding the sensor and the lancet. [0054] Further, according to claim 18 of the present invention, in the lancet-integrated sensor defined in claim 16, a space in which the front end of the sensor body can be housed is formed in the tube part. [0055] Accordingly, the sensor, which is fitted to the external measuring device and has finished measurement, can be set so that its front end is housed in the protection cover. Then, the used sensor in this state can be removed from the measuring device to be hygienically disposed of. [0056] Further, according to claim 19 of the present invention, the lancet-integrated sensor defined in any of claims 1 to 18 is provided with a holder which covers the periphery of the integrated sensor body and lancet to hold them. [0057] Accordingly, the periphery of the integrated sensor and lancet is covered with the holder, and the user can easily handle the lancet-integrated sensor by griping the holder. [0058] Further, according to claim 20 of the present invention, in the lancet-integrated sensor defined in claim 19, the holder is made of a transparent material. [0059] Accordingly, the sensor and the lancet in the holder can be easily checked, whereby handling is further facilitated. [0060] Further, according to claim 21 of the present invention, the lancet-integrated sensor defined in any of claims 1 to 20 is of a disposal type, which will be discarded after performing collection and analysis of the bodily blood one time. [0061] Accordingly, not only the sensor but also the lancet are necessarily renewed for every measurement, these devices can be hygienically managed. [0062] Further, according to claim 22 of the present invention, there is provided a measuring device to which a lancet-integrated sensor that is constituted by integrating a lancet for lancing the skin of a subject to extract its bodily fluid, and a sensor body for analyzing the extracted bodily fluid, is detachably attached, for measuring the characteristics of the bodily fluid collected by the lancet-integrated sensor, and the measuring device includes a lancet driving means for driving, after the lancet-integrated sensor is attached to the measuring device, the lancet so as to lance the skin. [0063] Accordingly, the conventional lancet device is integrated with the measuring device, whereby lancing operation and measurement can be performed by the measuring device alone without requiring a separate lancet device as conventional. Further, since the lancet integrated with the sensor is attached to the measuring device for every measurement, only the lancet driving means is to be added to the conventional measuring device and, therefore, the measuring device can be realized at low cost. [0064] Further, according to claim 23 of the present invention, in the measuring device defined in claim 22, at least one end of the lancet-integrated sensor is projected from the measuring device when attachment of the lancet-integrated sensor to the measuring device is completed. [0065] Accordingly, a patient lances his/her fingertip with the lancet, and drops the bodily fluid onto the sensor, with the exposed end of the lancet-integrated sensor as a mark, whereby the operation is facilitated. Further, since the end of the lancet-integrated sensor is exposed, the measuring device is prevented from being contaminated with the bodily fluid or the like. [0066] Further, according to claim 24 of the present invention, in the measuring device defined in claim 22 or 23, the lancet driving means drives the lancet of the lancet-integrated sensor so that the needle tip of the lancet is projected from the sensor only when it lances the skin to collect the bodily fluid and, at all other times, the needle tip is housed in the sensor. [0067] Accordingly, the needle tip of the lancet is housed in the sensor, whereby safety is further improved. [0068] Further, according to claim 25 of the present invention, the measuring device defined in claim 24 is provided with a connector for maintaining electrical connection with an electrode terminal that is placed at an end of the sensor body of the lancet-integrated sensor, to measure the characteristics of the collected bodily fluid by an internal electric circuit. [0069] Accordingly, the characteristics of the bodily fluid can be electrically measured. [0070] Further, according to claim 26 of the present invention, in the measuring device defined in any of claims 22 to 25, the lancet driving means drives the lancet when it is engaged with an end of the lancet on the opposite side to the needle tip, or when a grip part of a protection cover is griped. [0071] Accordingly, the external driving means for driving the lancet holds the end of the lancet, and drives the lancet in the longitudinal direction of the sensor to make the lancet perform the lancing operation. Further, when a holding part is provided on the end of the lancet, the driving means can easily hold the lancet. [0072] Further, according to claim 27 of the-present invention, in the measuring device defined in claim 26, the lancet driving means has a spring for applying a force to the lancet in the longitudinal direction of the sensor, and the force of the spring is released by a press button that is provided on the measuring device to project the lancet. [0073] Accordingly, the end of the lancet or the holding part is engaged with an end of the spring, whereby the elasticity of the coil spring is applied to the lancet. [0074] Further, according to claim 28 of the present invention, in the measuring device defined in any of claims 21 to 27, a lancet-integrated sensor as defined in any of claims 15 to 18 is detachably attached to the measuring device; and attachment of the lancet-integrated sensor to the measuring device is carried out with the tip of the lancet being covered with a protection cover, the sensor is held by the connector of the measuring device, and an end of the lancet on the opposite side to the needle tip is supported by the lancet driving means. [0075] Accordingly, injury by the needle tip of the lancet, and contamination of the needle tip are avoided. [0076] Further, according to claim 29 of the present invention, in the measuring device defined in any of claims 22 to 28, a lancet-integrated sensor as defined in any of claims 19 to 20 is detachably attached to the measuring device; and the sensor is held by the connector, and an end of the lancet on the opposite side to the needle tip or the grip part of the protection cover is held by the driving means, in accordance with the operation of engaging the holder with the measuring device, so that the sensor and the lancet are attached to the measuring device in the state where the sensor and the lancet are being held by the holder. [0077] Accordingly, the periphery of the integrated sensor and lancet is covered with the holder, and the user can easily handle the lancet-integrated sensor by griping the holder. [0078] Further, according to claim 30 of the present invention, in the measuring device defined in any of claims 22 to 29, a lancet-integrated sensor which has been used is ejected from the measuring device body without being touched with hands, by operating an operation button that is provided on the measuring device body. [0079] Accordingly, the user can remove the used lancet-integrated sensor from the measuring device without touching it with hands so that the hands are not contaminated, whereby infectious diseases or the like are avoided. [0080] Further, according to claim 31 of the present invention, in the measuring device defined in any of claims 22 to 30, the amount of projection of the needle tip of the lancet from the front end of the sensor is displayed on a display means that is provided on the measuring device body. [0081] Accordingly, the user can certainly confirm the amount of projection of the needle tip of the lancet with the display means, whereby usability is improved. [0082] Further, according to claim 32 of the present invention, there is provided a lancet-integrated sensor which is-constituted by integrating a lancet having a needle for lancing skin to collect bodily fluid, and a sensor for analyzing the collected bodily fluid, wherein a cavity for slidably housing a part of the lancet is formed in the sensor, and a force is applied to the lancet in a direction opposite to the direction along which the needle lances the skin, to house the needle in the sensor, whereby the lance and the sensor are locked with each other. [0083] Accordingly, the lancet onto which the bodily fluid sticks is locked in the sensor, whereby the user can safely remove the lancet-integrated sensor from the measuring device without touching the needle tip with hands by mistake. [0084] Further, according to claim 33 of the present invention, in the lancet-integrated sensor defined in claim 32, the lancet comprises an approximately-rectangle-shaped plate member; the needle of the lancet is arranged in the vicinity of the center of one of the shorter sides of the plate member so that it projects along the longitudinal direction of the plate member; the cavity is formed in a shape approximately identical to an outline shape that is obtained when the lancet is slid by a predetermined amount along the longitudinal direction thereof; and openings for projecting the needle and the other side of the lancet to the outside of the sensor are formed at the front end and the rear end of the sensor, respectively. [0085] Accordingly, the lancet onto which the bodily fluid sticks is locked in the sensor, whereby the user can safely remove the lancet-integrated sensor from the measuring device without touching the needle tip with hands by mistake. [0086] Further, according to claim 34 of the present invention, in the lancet-integrated sensor defined in claim 32 or 33, either a convex portion for locking or a concave portion for locking is formed on the lancet, and either a concave portion for locking or a convex portion for locking which is engaged with the convex portion or the concave portion of the lancet is formed on the sensor; and the lancet and the sensor are locked with each other when the convex portion for locking and the concave portion for locking are engaged with each other. [0087] Accordingly, the lancet onto which the bodily fluid sticks is locked in the sensor, whereby the user can safely remove the lancet-integrated sensor from the measuring device without touching the needle tip with hands by mistake. [0088] Further, according to claim 35 of the present invention, in the lancet-integrated sensor defined in claim 34, the lancet has two plate-shaped projections which project from the two longer sides of the lancet in the width direction; the projections have the concave portions for locking on their upper surfaces; a cavity for slidably housing the lancet, which is formed in the sensor, has two depressions for housing the two projections of the lancet, which depressions project in the width direction of the cavity; and the depressions have the concave portions for locking at their ceilings. [0089] Accordingly, the lancet onto which the bodily fluid sticks is locked in the sensor, whereby the user can safely remove the lancet-integrated sensor from the measuring device without touching the needle tip with hands by mistake. [0090] Further, according to claim 36 of the present invention, the measuring device for performing measurement using a lancet-integrated sensor, which is defined in claim 33, comprises a guide member for guiding the lancet-integrated sensor that is inserted from an opening provided on a side surface of the measuring device, thereby restricting the direction along which the lancet-integrated sensor travels in the measuring device; a lancet pressing member which is pushed by a spring member in the measuring device in a direction opposite to the direction along which the lancet-integrated sensor is inserted, and is engaged with the other shorter side of the lancet that is guided toward the inside of the measuring device by the guide member, thereby pressing the lancet toward the opening; a locking member for fixing the lancet pressing member at a predetermined position in the measuring device when the lancet-integrated sensor is inserted deeper into the measuring device; an unlocking member for releasing fixation of the lancet pressing member by the locking member, with manual operation; and an ejection member for applying a force-to the sensor of the lancet-integrated sensor to push the sensor toward the opening side, with manual operation, which ejection member is provided between the lancet pressing member and the guide member. [0091] Accordingly, it is possible to realize a measuring device which can perform measurement using a lancet-integrated sensor that can be safely removed from the measuring device because the lancet to which the bodily fluid sticks is locked in the sensor to prevent the hands of the user from touching the needle tip by mistake and, after the measurement, the lancet-integrated sensor can be safely removed from the measuring device with the needle tip being housed in the sensor. [0092] Further, according to claim 37 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 36, the ejection member slides an operation lever that is exposed at the main surface of the measuring device, toward the opening side, whereby a pressing member that is united with the operation lever presses the vicinity of both sides of an end of the lancet-integrated sensor, which end is opposite to the side where the lancet lances the skin, thereby ejecting the lancet-integrated sensor. [0093] Accordingly, it is possible to realize a measuring device which can perform measurement using a lancet-integrated sensor that can be safely removed from the measuring device because the lancet to which the bodily fluid sticks is locked in the sensor to prevent the hands of the user from touching the needle tip by mistake and, after the measurement, the lancet-integrated sensor can be safely removed from the measuring device with the needle tip being housed in the sensor. [0094] Further, according to claim 38 of the present invention, there is provided a measuring device for performing measurement using a lancet-integrated sensor which is constituted by integrating a lancet for lancing skin to collect bodily fluid, and a sensor for analyzing the collected bodily fluid, wherein the measuring device for the lancet-integrated sensor has an opening on a side surface; the measuring device has a cavity in which the lancet-integrated sensor can be housed, which cavity is formed corresponding to the opening; a holder attachment part is formed on the side of the measuring device having the opening, which holder attachment part detachably attaches a holder body in which the lancet-integrated sensor can path through, to the measuring device; and the holder body guides the lancet-integrated sensor when the lancet-integrated sensor is housed in the cavity and, after it is housed in the cavity, the holder body holds a portion of the lancet-integrated sensor in the vicinity of the end where the lancet lances the skin. [0095] Accordingly, the holder body is constituted to be detachable from the measuring device so that replacement or washing of the holder body is easily carried out, and the measuring device can be used not only by a specific user but also by other persons, whereby the measuring device for the lancet-integrated sensor-can be safely and hygienically used. [0096] Further, according to claim 39 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 38, engagement portions of the holder and the holder attachment part have asymmetrical shapes in the vertical direction or in the horizontal direction; and attachment of the holder to the holder attachment part is possible only when the vertical direction of the holder with respective to the holder attachment part is a predetermined direction. [0097] Accordingly, the holder body can always be inserted into the measuring device in the normal direction, and the lancet-integrated sensor is prevented from being inserted upside down into the measuring device. [0098] Further, according to claim 40 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 38, the opening of the holder attachment part into which the holder body is inserted has a shape of an approximately rectangle that is side-to-side long, with portions corresponding to the corners of the rectangle being rounded, and the opening has smaller openings overhanging in the width direction in the vicinities of the centers of two sides in the longitudinal direction. [0099] Accordingly, the opening of the holder attachment part becomes asymmetrical in the longitudinal direction and in the width direction, whereby the holder is prevented from being inserted in a wrong direction. [0100] Further, according to claim 41 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 40, the holder body has hinge-shaped stoppers; inner sides of the hinge-shaped stoppers are fixed to the holder body; and outer sides of the hinge-shaped stoppers are engaged with the engagement portions of the holder attachment part. [0101] Accordingly, the holder body can always be inserted into the measuring device in the normal direction, and the lancet-integrated sensor is prevented from being inserted upside down into the measuring device. [0102] Further, according to claim 42 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 40, the holder body has a peripheral edge part that extends along the surface of the opening at the periphery of the opening excluding the smaller openings, on the side where the holder body is attached to the measuring device; the hinge-shaped stoppers are provided in portions of the peripheral edge part corresponding to the smaller openings; and the hinge-shaped stoppers are obtained by extending band-shaped elastic members in the direction along which the lancet-integrated sensor is impacted into the holder body, and bending the elastic members outward at 180.degree.. [0103] Accordingly, the holder body is attached to the measuring device with stability, by the extending force due to the elasticity of the stopper. [0104] Further, according to claim 43 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 42, each of the hinge-shaped stoppers has a clip member at the front end of the band-shaped elastic member, which clip member is thicker than the elastic member, and performs positioning when the holder body is latched in the opening. [0105] Accordingly, the front end of each stopper is engaged with the inside of the smaller opening of the measuring device so as to prevent disconnection of the stopper from the smaller opening, whereby the holder body is attached to the measuring device with stability. [0106] Further, according to claim 44 of the present invention, there is provided a biosensor cartridge for housing plural biosensors, each having a reagent layer for detecting a specific component in bodily fluid of a subject, and an electrode for taking out an electric signal indicating that the reagent layer detects the specific component, wherein a cartridge body has, at an end of its upper surface, a hinge for rotatably fixing a lid that covers the cartridge; the cartridge body has plural slits for perpendicularly supporting the respective biosensors; and the plural slits are formed in parallel with each other, from the upper surface toward the lower surface of the cartridge body, at regular intervals which allow an insertion slot of a measuring device for performing measurement using a target biosensor to be inserted without touching biosensors adjacent to the target biosensor. [0107] Accordingly, the user can attach the sensor to the measuring device by only opening the lid and pressing the sensor-insertion slot of the measuring device onto the sensor. Therefore, troublesome preparation for measurement, i.e., holding the sensor with hands to insert it into the measuring device at every measurement, is saved, resulting in improved usability. [0108] Further, according to claim 45 of the present invention, in the biosensor cartridge defined in claim 44, the cartridge body to which the lid is attached is a rectangular parallelepiped in shape. [0109] Accordingly, the user can attach the sensor to the measuring device by only opening the lid and pressing the sensor insertion slot of the measuring device onto any of the sensors which are supported at regular intervals by the rectangular parallelepiped cartridge body. Therefore, troublesome preparation for measurement, i.e., holding the sensor with hands to insert it into the measuring device at every measurement, is saved, resulting in improved usability. [0110] Further, according to claim 46 of the present invention, in the biosensor cartridge defined in claim 45, the lid is a hollow rectangular parallelepiped in shape, and has an opening at a portion opposed to the upper surface of the cartridge body. [0111] Accordingly, the user can attach the sensor to the measuring device by only opening the hollow and rectangular parallelepiped lid, and pressing the sensor insertion slot of the measuring device onto any of the sensors which are supported at regular intervals by the rectangular parallelepiped cartridge body. Therefore, troublesome preparation for measurement, i.e., holding the sensor with hands to insert it into the measuring device at every measurement, is saved, resulting in improved usability. [0112] Further, according to claim 47 of the present invention, in the biosensor cartridge defined in claim 44, the bottom of each slit has a shape that conforms to the shape of the front end of the biosensor. [0113] Accordingly, the bottom of each slit of the cartridge body conforms to the shape of the front end of the biosensor so that no stress is applied to a specific portion of the front end of the biosensor, whereby the biosensor can be supported with reliability. [0114] Further, according to claim 48 of the present invention, in the biosensor cartridge defined in claim 47, the front end of the biosensor is semi-circular in shape. [0115] Accordingly, the bottom of each slit of the cartridge body conforms to the semi-circular shape of the front end of the biosensor so that no stress is applied to a specific portion of the front end of the biosensor, whereby the biosensor can be supported with reliability. [0116] Further, according to claim 49 of the present invention, in the biosensor cartridge defined in claim 44, the hinge is constituted by a pair of bearings each having a side-to-side long bearing hole that projects outward along the longitudinal direction of the cartridge body from an end of the upper surface of the cartridge body, and a pair of axial projections which are provided at an end of the lid, and serve as fulcra when being smooth-movably engaged with the bearings to rotate the lid; a peripheral edge part is formed at the periphery of the upper surface of the cartridge body, which part extends in a direction perpendicular to the side walls of the cartridge body, and has plural notches; reverse-L-shaped projections are formed on the same plane as the side walls of the lid, in positions corresponding to the notches of the peripheral edge part, at the periphery of the opening of the lid; and a sealing member having elasticity is formed on the upper surface of the peripheral edge part. [0117] Accordingly, after the lid is closed, the lid is slid in the horizontal direction so that the reverse-L-shaped projections on the lid are engaged with the notches of the peripheral edge part of the cartridge body, whereby the sealing member having elasticity adheres closely to the edge of the opening of the lid and to the peripheral edge part of the cartridge body, and the hermeticity in the cartridge is increased, thereby preventing the sensor from being contaminated with the moisture. [0118] Further, according to claim 50 of the present invention, there is provided a biosensor cartridge for housing plural lancet-integrated biosensors, each being constituted by integrating a biosensor having a reagent layer for detecting a specific component in bodily fluid of a subject, and an electrode for taking out an electric signal indicating that the reagent layer detects the specific component, with a lancet for collecting the bodily fluid of the subject, wherein the cartridge body has, at an end of its upper surface, a hinge for rotatably fixing a lid that covers the cartridge body; the cartridge body has plural grooves for perpendicularly supporting the lancet-integrated biosensors; and the plural grooves are formed in parallel with each other, from the upper surface toward the lower surface of the cartridge body, at regular intervals which allow an insertion slot of a measuring device for performing measurement using a target biosensor to be inserted without touching biosensors adjacent to the target biosensor. [0119] Accordingly, the user can attach the lancet-integrated sensor to the measuring device by only opening the lid and pressing the sensor insertion slot of the measuring device onto the sensor. Therefore, troublesome preparation for measurement, i.e., holding the lancet-integrated sensor with hands to insert it into the measuring device at every measurement, is saved, resulting in improved usability. [0120] Further, according to claim 51 of the present invention, in the biosensor cartridge defined in claim 50, the lancet-integrated biosensor includes an approximately-square-shaped and narrow protector for protecting the lancet that projects from the lancet-integrated biosensor in its unused state; a sensor body in which the lancet is smooth-movably housed, the sensor body being approximately rectangle in shape, has a front end being semi-circular in shape, and is a little wider than the protector; and a connector which is provided on the lancet, protrudes backward from the sensor body, and has a width approximately equal to the width of the sensor body; wherein each of the plural grooves comprises a narrow first groove which is provided at the lowest surface side of the cartridge body, and conforms to the shape of the protector; a second groove which is wider than the first groove, is provided above the first groove, and conforms to the shape of a portion of the sensor body; and a third groove which is wider than the second groove, is provided above the second groove, and conforms to the shape of the insertion slot part of the measuring device into which the sensor body is inserted. [0121] Accordingly, the lancet-integrated sensors each having a complicated shape can be supported at regular intervals, and the user can attach the lancet-integrated sensor to the measuring device by only pressing the sensor insertion slot of the measuring device onto the sensor. Therefore, troublesome preparation for measurement, i.e., holding the sensor with hands to insert it into the measuring device at every measurement, is saved, resulting in improved usability. [0122] Further, according to claim 52 of the present invention, in the biosensor cartridge defined in claim 51, the insertion slot stores the sensor body into a cavity which penetrates a pillar-shaped projection that projects from a side surface of the measuring device; and the connector is stored in the cavity that extends into the measuring device. [0123] Accordingly, the user can attach the lancet-integrated sensor having a complicated rear-end shape to the measuring device by only pressing the sensor insertion slot of the measuring device onto the sensor. Therefore, troublesome preparation for measurement, i.e., holding the sensor with hands to insert it into the measuring device at every measurement, is saved, resulting in improved usability. [0124] Further, according to claim 53 of the present invention, there is provided a measuring device for performing measurement using a lancet-integrated sensor that is attached thereto, the lancet-integrated sensor being constituted by integrating a lancet for lancing skin to collect bodily fluid, and a sensor for analyzing the extracted bodily fluid, and the measuring device includes a drive means for driving the lancet in a direction in which the lancet lances the skin, along the longitudinal direction of the sensor, from the standby position of the lancet; wherein, after the drive means has driven the lancet in the direction in which the lancet lances the skin, the drive means can drive the lancet back to the standby position while maintaining the state where the lancet-integrated sensor is attached to the measuring device. [0125] Accordingly, even when the lancet fails to lance the skin in the process of collecting the bodily fluid,: or measurement cannot be carried out due to some problem, re-preparation for measurement can be easily carried out, whereby usability of the measuring device for the lancet-integrated sensor is further improved. [0126] Further, according to claim 54 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 53, the drive means has a shaft to which a connector receiver is fixed at an end on the side where the lancet lances the skin, which connector receiver receives an end of the lancet on the side opposite to the side where the lancet lances the skin; a pull stick for driving the lancet back in a direction opposite to the direction in which the lancet lances the skin is disposed on an end of the shaft on the side opposite to the side where the lancet lances the skin; and the connector receiver is provided with a claw portion which is unlocked by pressing an operation button to start the operation of the drive means, and stops the motion of the connector receiver against a force applied by a spring that is provided on the shaft to move the connector receiver in the direction in which the lancet lances the skin. [0127] Accordingly, even when the lancet fails to lance the skin in the process of collecting the bodily fluid, or measurement cannot be carried out due to some problem, re-preparation for measurement can be easily carried out by operating the pull stick, whereby usability of the measuring device for the lancet-integrated sensor is further improved. [0128] Further, according to claim 55 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 54, the measuring device has, in its internal cavity, a support member for slidably supporting the shaft in the vicinity of its center; and the spring is a coil spring which is placed between the support member of the shaft and the connector receiver. [0129] Accordingly, the shaft is supported in the measuring device, and the coil spring which is placed between the support member and the connector receiver supplies a force for driving the lancet. [0130] Further, according to claim 56 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 54, the pull stick has an opening which is formed at an end of the side where the lancet lances the skin; an end of the shaft on the side opposite to the side where the lancet lances the skin is slidably housed in the pull stick through the opening; the end of the shaft on the side opposite to the side where the lancet lances the skin has a slip-out prevention member for preventing the end of the shaft to slipping out of the pull stick toward the side where the lancet lances the skin. [0131] Accordingly, the shaft can be drawn out in the-lancet projecting direction and in the opposite direction by pulling the pull stick. [0132] Further, according to claim 57 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 54, the driving means is provided with a lancet projection amount adjuster for adjusting the amount of projection of the needle of the lancet that lances the skin, which driving means is placed between the measuring device and the pull stick. [0133] Accordingly, the amount of projection of the needle tip of the lancet is adjustable, whereby the amount of the bodily fluid oozing out of the skin of the subject can be adjusted, or the pain by being lanced with the lancet can be reduced. [0134] Further, according to claim 58 of the present invention, in the measuring device for a lancet-integrated sensor which is defined in claim 57, the pull stick is approximately cylindrical in shape, and an end of the pull stick on the side opposite to the side where the lancet lances the skin has a handle part having a portion of a diameter larger than the diameter of the cylindrical part; the lancet projection amount adjuster is approximately cylindrical in shape, and an end of the adjuster on the side opposite to the side where the lancet lances the skin has an opening having a diameter equal to the diameter of the cylindrical part of the pull stick; and the cylindrical part is slidably housed through the opening, and the cylindrical part is screwed into a screw hole that is formed on a-side surface of the measuring device on the side opposite to the side where the lancet lances the skin, toward the inside of the measuring device, whereby the cylindrical part rotates in the screw direction or in the opposite direction to adjust the amount of projection of the lancet. [0135] Accordingly, the amount of projection of the needle tip of the lancet is adjustable, whereby the amount of the bodily fluid oozing out of the skin of the subject can be adjusted, or the pain by being lanced with the lancet can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS [0136] FIGS. 1(a) and 1(b) are diagrams illustrating a lancet-integrated sensor according to a first embodiment of the present invention, wherein FIG. 1(a) is a perspective view of the whole, and FIG. 1(b) is an exploded perspective view thereof. [0137] FIGS. 2(a)-2(d) are plan views for explaining the operation of the lancet-integrated sensor, wherein FIG. 2(a) shows the state where a needle tip, which is covered with a protection cover, protrudes from the sensor, FIG. 2(b) shows the state where the needle tip, which is covered with the protection cover, is housed in the sensor, FIG. 2(c) shows the state where the needle tip, from which the protection cover is removed, protrudes from the sensor, and FIG. 2(d) shows the state where the needle tip, from which the protection cover is removed, is housed in the sensor. [0138] FIGS. 3(a) and 3(b) are perspective views of a measuring device to be combined with the lancet-integrated sensor according to the first embodiment of the invention, wherein FIG. 3(a) shows its upper surface, and FIG. 3(b) shows its lower surface. [0139] FIGS. 4(a) and 4(b) are diagrams for explaining the internal structure of the measuring device, wherein FIG. 4(a) is an exploded perspective view of its lower half side, and FIG. 4(b) is a cross-sectional view of its side surface. [0140] FIGS. 5(a)-5(c) are diagrams for explaining the operation for attaching the lancet-integrated sensor to the measuring device, wherein FIG. 5(a) is a sectional side elevation view at starting of the attachment, FIG. 5(b) is a sectional side elevation view at completion of the attachment, and FIG. 5(c) is a sectional view in the vicinity an operation button. [0141] FIGS. 6(a) and 6(b) are diagrams illustrating a protection cover of the lancet-integrated sensor according to the first embodiment of the invention, wherein FIG. 6(a) shows the state where the protection cover is fitted when the needle tip protrudes, and FIG. 6(b) shows the state where the protection cover is fitted to a front end of the sensor when the needle tip is housed. [0142] FIG. 7 is a perspective view of a measuring device to be combined with the lancet-integrated sensor according to the first embodiment of the invention. [0143] FIGS. 8(a) and 8(b) are diagrams illustrating a lancet-integrated sensor according to a second embodiment of the invention, wherein FIG. 8(a) shows a perspective view of the whole, and FIG. 8(b) is an exploded perspective view thereof. [0144] FIGS. 9(a) and 9(b) are diagrams illustrating the lancet-integrated sensor according to the second embodiment of the invention and a measuring device for the lancet-integrated sensor, wherein FIG. 9(a) is a perspective view of the measuring device in the state where the sensor is attached thereto, and FIG. 9(b) is a cross-sectional view of the measuring device in the state where the sensor is attached thereto. [0145] FIG. 10 is a diagram for explaining engagement of a fine concave portion provided in the lancet with a fine convex portion provided in the sensor. [0146] FIGS. 11(a) and 11(b) are diagrams illustrating the appearance of a measuring device for a lancet-integrated sensor according to a third embodiment of the invention, wherein FIG. 11(a) shows the state where a holder is attached, and FIG. 11(b) shows the state where the holder body is removed. [0147] FIGS. 12(a)-12(c) are diagrams illustrating the appearance of the holder of the measuring device for a lancet-integrated sensor according to the third embodiment of the invention, wherein FIG. 12(a) is an elevational view in the state where the holder is attached to the measuring device, FIG. 12(b) is a cross-sectional view when the holder attached to the measuring device is viewed from above, and FIG. 12(c) is a cross-sectional view when the holder to be removed from the measuring device is viewed from above. [0148] FIGS. 13(a) and 13(b) are diagrams illustrating the internal structure of the measuring device which uses a lancet-integrated sensor according to the third embodiment of the invention, and another construction of a lancet-integrated sensor, wherein FIG. 13(a) is a cross-sectional view of the measuring device in the state where the holder is attached, and FIG. 13(b) is a partially cutaway cross-sectional view of the measuring device in the state where the holder is attached. [0149] FIG. 14 is a diagram illustrating the appearance of a measuring device which uses a lancet-integrated sensor according to a fourth embodiment of the invention. [0150] FIG. 15 is a cross-sectional view illustrating the internal structure of the measuring device according to the fourth embodiment of the invention. [0151] FIG. 16 is a cross-sectional view illustrating a biosensor cartridge according to a fifth embodiment of the invention. [0152] FIGS. 17(a) and 17(b) are diagrams illustrating the state where a sensor stored in the biosensor cartridge according to the fifth embodiment of the invention is inserted into a measuring device, wherein FIG. 17(a) shows the state where the sensor is inserted, and FIG. 17(b) shows the state before the sensor is inserted. [0153] FIGS. 18(a)-18(c) are diagrams illustrating a biosensor cartridge according to a first modification of the fifth embodiment of the invention, wherein FIG. 18(a) is a perspective view illustrating the state where a lid is opened, FIG. 18(b) is a side view illustrating the state wherein the lid is closed, and FIG. 18(c) is a cross-sectional view illustrating the state where the lid is closed. [0154] FIG. 19 is a diagram illustrating a biosensor cartridge according to a second modification of the fifth embodiment of the invention. [0155] FIGS. 20(a) and 20(b) are diagrams for explaining attachment of a lancet-integrated sensor to a measuring device in the biosensor cartridge according to the second modification of the fifth embodiment of the invention, wherein FIG. 20(a) is a diagram illustrating the state where the sensor is attached, and FIG. 20(b) is a diagram illustrating the state before the sensor is attached. [0156] FIG. 21 is a perspective view illustrating an example of a conventional measuring device for a biosensor. [0157] FIGS. 22(a) and 22(b) are diagrams illustrating a conventional lancet device, wherein FIG. 22(a) is a perspective view thereof, and FIG. 22(b) is a perspective view thereof in the state where a part of the lancet device is seen through. [0158] FIGS. 23(a) and 23(b) are diagrams illustrating a conventional manner of housing biosensors, wherein FIG. 23(a) shows the state where a biosensor is wrapped with a wrapper, and FIG. 23(b) shows the state where plural biosensors are stored in a plastic container. [0159] FIG. 24 is a diagram illustrating the state where a biosensor is inserted into a measuring device. BEST MODE TO EXECUTE THE INVENTION [0160] (Embodiment 1) [0161] Hereinafter, a first embodiment of the present invention will be specifically described taking, as an example, a blood sugar sensor for electrochemically measuring blood sugar, with reference to the drawings. [0162] The first embodiment relates to a lancet-integrated sensor in which a lancet and a sensor are integrated to facilitate management and carrying, and a measuring device for driving the lancet-integrated sensor, and performing measurement using the sensor. This first embodiment corresponds to claims 1 to 31 of the present invention. [0163] That is, in the lancet-integrated sensor according to the first embodiment, a long and narrow strip-shaped sensor and a lancet are integrated with each other and, more specifically, the lancet is horizontally movable along the longitudinal direction of the sensor. [0164] The measuring device, to which the lancet-integrated sensor is fitted, is provided with a lancet driving function of the conventional lancet device. That is, the measuring device is provided with a driving means for driving the lancet of the lancet-integrated sensor that is fitted thereto. [0165] In this construction, a patient sets a new lancet-integrated sensor onto the measuring device every time he/she performs measurement. Then, the patient grips the measuring device, and turns on the lancet driving means to lance his/her fingertip with the lancet. Subsequently, the patient drops blood onto the sensor to measure blood sugar or the like. [0166] Hereinafter, the lancet-integrated sensor and the measuring device will be described more specifically. [0167] FIGS. 1(a) and 1(b) are a perspective view and an exploded perspective view of a lancet-integrated sensor according to the first embodiment of the invention, respectively. With reference to FIG. 1(a), numeral 10 denotes a lancet-integrated sensor, wherein numeral 1 denotes a long and narrow strip-shaped sensor, and numeral 2 denotes a lancet, a greater part of which is housed in a hollow (space) 1a in the sensor 1, and the lancet 2 is supported by the sensor (sensor body) 1 so as to be slidable in the longitudinal direction of the sensor 1. [0168] Reference numeral 3 denotes a protection cover into which the needle tip of the lancet 2 is pressed, thereby protecting the needle tip. This cover 3 is removed during measurement. Reference numeral 4 denotes electrode terminals for making electrical connection to a measuring device which is later described. Reference numeral 5 denotes a cavity provided at the semi-circular front end of the sensor 1. [0169] As shown in FIG. 1(b), the construction of the sensor 1 is obtained by bonding a cover (plate) 6 to a substrate (plate) 7 together, which are made of a resin such as polyethylene terephthalate. Further, the lancet 2 comprises a metal needle 2a, and a connector (end portion) 2b which has the needle 2a at its front end, and holds the needle 2a. A rear end portion of the approximately strip-shaped connector 2b projects from the rear end of the sensor 1 to be engaged with the driving means of the measuring device which is described later. [0170] At the lower surface of the cover 6, concave portions which conform to the shape of the lancet 2 are provided. More specifically, there are provided a groove (concave portion) 6a which conforms to the outline of the connector 2b so that the connector 2b is slidably housed in it along its longitudinal direction, and a long and narrow groove (concave portion) 6b in which the needle 2a is housed. The groove 6b in which the needle 2a is housed is extended to the front end of the sensor 1. Further, a pair of electrodes 8 leading to the electrode terminals 4 are formed on the surface of the substrate 7, and a reagent layer (not shown) is formed on the surface of the electrodes 8. [0171] In this way, the lancet-integrated sensor is obtained by bonding the cover 6 and the substrate 7 together, with the lancet 2 being placed between them. Accordingly, the cavity 5 also serves as the long and narrow groove 6b in which the needle 2a is housed. Further, portions of the electrodes 8 and the reagent layer are exposed in the cavity 5. [0172] As described above, the lancet 2 is movable along the longitudinal direction of the sensor 1, and its motion will be described hereinafter with reference to a plan view shown in FIG. 2. [0173] FIG. 2(a) shows a state where the position of the lancet 2 is closest to the front end of the sensor 1. That is, each of fine projections 2c, which are formed so as to project from the connector 2b in the direction perpendicular to the longer side of the connector 2b within the same plane as the main surface of the connector 2b, abuts on a side wall 60b at an end of a wide concave groove (concave portion) 60a on the topmost side of the sensor 1, which groove 60a is formed in the cover 6. In this state, a longest portion of the needle 2a of the lancet 2 projects from the front end of the sensor 1. FIG. 2(b) shows a state where each of the fine projections 2c of the connector 2b abuts on a side wall 60c at an end of the concave groove 60a on the rearmost side of the sensor 1. In this state, the needle of the lancet 2 is completely housed in the sensor 1. [0174] As shown in FIGS. 2(a) and 2(b), the shape of the groove 60a is curved such that, at the end where the fine projection 2c is positioned, the width of the groove 60a is a-little narrower than the width of the connector 2b including the fine projection 2c. Accordingly, at the end of the concave groove 60a, the connector 2b is latched by the sensor 1 due to the mutual pressing or friction. [0175] The construction of the lancet-integrated sensor is as described above, and the protection cover 3 is removed for measurement, and a fingertip or the like is lanced with the tip of the needle 2a of the lancet 2 which projects from the opening of the cavity 5, as shown in FIG. 2(c). When blood is dropped onto the sensor 1 and sucked into the cavity 5 to measure blood sugar as shown in FIG. 2(d), the needle tip of the lancet 2 is positioned in the groove 6a which is apart from the cavity 5 so that the needle does not contact the blood sucked into the cavity 5. [0176] Measuring Device [0177] Next, an example of a measuring device to be connected with the above-described lancet-integrated sensor will be described with reference to the drawings. [0178] FIGS. 3(a) and 3(b) are perspective views of a measuring device 11 to which a lancet-integrated sensor is fitted, and FIG. 3(a) mainly shows its upper surface while FIG. 3(b) mainly shows its lower surface. Reference numeral 12 denotes a display (display means) for displaying the result of measurement and the like, and numeral 13 denotes a slot into which the lancet-integrated sensor is inserted. Reference numeral 14 denotes a push button (unlocking member) for driving the lancet that is fitted to the measuring device 11 such that the lancet forcibly projects to lance a fingertip or the like. Further, reference numeral 15 denotes a slide button (ejection member, operation button) for ejecting the used lancet-integrated sensor from the measuring device 11. Further, reference numeral 16 denotes an adjustment button (lancet projection amount adjuster) for adjusting the amount of projection of the needle tip of the lancet. [0179] FIG. 4(a) is a perspective view of the measuring device 11 in the state where an upper portion of a package case is removed to show the internal structure of the measuring device 11, and FIG. 4(a) specifically shows the connection terminal to be electrically connected with the sensor, and the driving means to be engaged with the connector of the lancet. Further, FIG. 4(b) is a side view of the measuring device. [0180] Reference numeral 17 denotes a pair of guides having connection terminals to be electrically connected with the electrode terminals of the sensor. The guides 17 are planted on the substrate 11a at the bottom of the package case by resin molding so as to have approximately-L-shaped cross sections, and connection terminals are formed on the ceilings of the guides 17. Further, at an end of each guide 17, which is opposite to a connector receiver 19b, a termination member 17a is planted to make a dead-end, excluding a space between the guides 17. When fitting the lancet-integrated sensor to the measuring device, the sensor 10 is guided by the guides 17 to be set. [0181] Reference numeral 18 denotes a coil spring (lancet pushing member) for driving the lancet 2, and numeral 19 denotes a connect receiver (lancet pushing member) which is engaged with the connector 2b of the lancet 2. The connector receiver 19 is slidably supported by a pair of approximately-inverse-L-shaped supporting members 24 which are planted on the substrate 11a, and an end of the coil spring 18 is fixed onto a side of the connector receiver 19, which is opposite to the side that is engaged with the sensor 10. The other end of the coil spring 18 is supported by a spring stopper (lancet pushing member) 23. When the lancet 2 is engaged with the connector receiver 19 and the lancet 2 is pushed into the measuring device 11, the coil spring 18 is compressed, whereby a force for driving the lancet 2 is applied to the coil spring 18. [0182] Reference numeral 20 denotes a driving lever having a tapered projection 20a which is engaged with a tapered projection lic that is positioned in front of the push button 14. When the lancet 2 is set up to a predetermined position, the driving lever 20 latches the connector receiver 19 to hold the driving force. This latching is canceled by pushing the push button 14, and the lancet 2 is driven by the pressing force-from the spring 18. [0183] Reference numeral 21 denotes a torsion spring for restricting the position of the connector receiver 19, and the torsion spring 21 is fixed by a shaft member 25 that is planted in the vicinity of a side surface parallel with the insertion path of the sensor 10. The torsion spring 21 pushes the connector receiver 19 that is not latched by the driving lever 20, in the direction against the elasticity of the coil spring 18. The torsion spring 21 restricts the position of the connector receiver 19, in balance with the elasticity of the coil spring 18, so that the needle tip of the lancet 2 is positioned apart from the cavity 5 to prevent the needle chip from contacting the blood drawn into the cavity 5. [0184] Reference numeral 22 denotes an ejection lever which is united with the slide button 15, and the ejection lever 22 pushes the rear end of the sensor 1 to eject the sensor 1 from the measuring device when the slide button 15 is operated in the direction indicated by an arrow a. [0185] Measuring Operation [0186] Hereinafter, a description will be given of a series of measuring operations, with respect to the lancet-integrated sensor and the measuring device, which are constructed as described above. [0187] Initially, an operation for fitting the lancet-integrated sensor to the measuring device will be described. The lancet-integrated sensor is in the state shown in FIG. 2(a) when it is not used. That is, the needle tip of the lancet 2 projects from the sensor 1, and is covered with the protection cover 3. A patient grips a wide grip part 3a of the protection cover 3, and inserts the lancet 2, from the connector 2b side, into the insertion slot 13 of the measuring device 11. [0188] The patient further pushes the grip part 3a of the protection cover 3 to insert the sensor 1 and the lancet 2 deeper into the measuring device 11. Thereby, as shown in FIG. 5(a), the sensor 1 is guided by the guide 17 to advance into a case 11b. As the sensor 1 continues to advance into the case, the shorter side of the sensor 1, which is opposite to the semi-circular side thereof, touches the termination member 17a of the guide 17 to be set at a fixed position where the advance of the sensor 1 into the case 11b is restricted, whereby the electrode terminals 4 of the sensor 1 are connected to the connection terminals (not shown) of the measuring device 11. In order to make FIG. 5(a) easy to see, only the sensor 1 of the lancet-integrated sensor is shown, and a part corresponding to the lancet 2 is omitted. [0189] Although the advance of the sensor 1 is stopped at this point of time, since the motion of the lancet 2 is not restricted by the termination member 17a of the guide 17 as shown in FIG. 5(c), the lancet 2 can be inserted deeper into the case 11b. That is, by the pressing force of the protection cover 3, the engagement of the fine projection 2c with the concave groove 60a is released at the position shown in FIG. 2(a). Then, as shown in FIG. 2(b), the tube 3b of the protection cover 3, which protects the needle 2a, is pushed into the sensor 1, and a side of the grip part 3a of the protection cover 3 touches the front end of the sensor 1. [0190] When the patient pushes the protection cover 3 deeper than the state shown in FIG. 5(a), the connector 2b of the lancet 2 is engaged with the concave portion 19a of the connector receiver 19 and, as shown in FIG. 5(b), the coil spring 18 is compressed, whereby the tapered projection 20a of the driving lever 20 of the connector receiver 19 is latched by the tapered projection lic in front of the push button 14 to complete fitting of the sensor 10. [0191] Next, a blood collecting operation and a blood dropping operation will be described. FIG. 3(a) shows the state where fitting of the lancet-integrated sensor to the measuring device is completed. The patient holds the measuring device 11, and lightly pushes the front end of the sensor 10 against a portion of his/her body from which blood is to be extracted, such as a fingertip. [0192] When the patient pushes the push button 14, the lancet 2 is driven, and the needle tip forcibly projects from the front end of the sensor 10 to lance the skin of the patient. At this time, the amount of projection of the needle tip from the sensor is variable by sliding the adjustment button 16 in the horizontal direction. To be specific, the torsion spring 21 is moved in the horizontal direction in the measuring device 11 by sliding the adjustment button 16 in the horizontal direction, thereby to adjust the spring force. Alternatively, the distance between the connector receiver 19 that is engaged with the push button 14, and-the spring stopper 23 is increased or reduced by driving a mechanism (not shown) for converting the motion of the adjustment button 16 in the horizontal direction into the to-and-fro motion of the spring stopper 23 along the driving direction of the lancet 2. The amount of projection can be displayed on the display unit 12 by converting the amount of sliding of the adjustment button 16 to the amount of projection using a CPU or the like of the measuring device. [0193] The patient drops a small amount of blood that is oozing from the lanced fingertip, onto the front end of the sensor 10, and the dropped blood is drawn into the cavity 5 by capillary phenomenon. The measuring device 11 measures blood sugar with the internal electronic circuit, and displays the result on the display unit 12. When the result of measurement is displayed to end the measurement, the patient slides the slide button 15 in the direction toward which the lancet 2 projects, whereby the lancet-integrated sensor is ejected from the measuring device 11, and the ejected lancet-integrated sensor is disposed of. [0194] At this point of time, the connector 2b of the lancet 2 is engaged with the connector receiver 19 of the measuring device 11 although the ejection lever 22 pushes the rear end of the sensor 1. Since the sensor 1 is ejected firstly, the positional relationship between the sensor 1 and the lancet 2 goes into the state shown in FIG. 2(d). Then, the fine projection 2c of the lancet 2 is engaged with the concave groove 60a, and the lancet-integrated sensor is ejected from the measuring device 11 with the needle tip of the lancet 2 being completely housed in the sensor 1. Therefore, it is possible to prevent injury or infectious disease caused by that the needle tip protrudes from the sensor. [0195] As described above, according to the first embodiment of the invention, since the sensor and the lancet are integrated with each other, management thereof is facilitated, and the trouble of separately replacing the sensor and the lancet at every use is saved. Further, since the sensor and the lancet can be simultaneously set in the measuring device, setting is facilitated, and the whole unit is reduced in size and easy to carry. [0196] When the lancet-integrated sensor is ejected, in order to prevent injury and infectious disease more reliably, a semi-circular space that conforms to the shape of the front end of the sensor 1 is formed on a side of the grip part 3a of the protection cover 3 as shown in FIG. 6(a), and the lancet-integrated sensor may be ejected with the sensor 1 being covered with the protection cover 3 as shown in FIG. 6(b). [0197] Further, while the lancet-integrated sensor according to the first embodiment is provided with the protection cover that covers the tip of the lancet, the lancet-integrated sensor may be provided with a holder which covers the periphery of the lancet-integrated sensor and the protection cover to hold them. In this case, fitting of the lancet-integrated sensor to the measuring device and ejection of the sensor from the measuring device can be carried out with the sensor being covered with the holder, and the operation is eased for patients with manual impairments. [0198] When the holder is formed of a transparent material to make it easy to see the internal lancet-integrated sensor, the operability is further enhanced. [0199] Furthermore, while in the first embodiment the lancet-integrated sensor uses the space in which the needle tip of the lancet moves, also as the cavity into which blood is drawn, the space and the cavity may be separated. Further, while in this first embodiment the sensor is a thin plate in shape, the shape of the sensor is not restricted thereto, and the sensor may be cylindrical in shape. [0200] Furthermore, as shown in FIG. 7, the slide button 15 of the measuring device 11 may have wave-shaped projections and depressions on its upper surface to prevent the finger from slipping, and the shape of the sensor insertion slot 13 may be approached to rectangle. [0201] (Embodiment 2) [0202] According to a second embodiment of the invention, when the lancet-integrated sensor is disconnected from the measuring device, the tip of the needle 2a is reliably housed in the sensor to prevent the possibility that a finger of another person touches the needle 2a onto which the bodily fluid remains, or a person pricks his/her finger with the needle 2a.by mistake, thereby avoiding infectious disease as well as problems in terms of safety. This second embodiment corresponds to claims 32 to 37. [0203] Hereinafter, a description will be given of a lancet-integrated sensor, and a measuring device which performs a measurement using the lancet-integrated sensor. [0204] FIG. 8(a) is a perspective view illustrating an example of a lancet-integrated sensor according to the second embodiment of the invention. [0205] With reference to FIG. 8(a), reference numeral 2 denotes a lancet for lancing the skin of a man or an animal to extract bodily fluid. The lancet 2 is composed of a connector 2b which is made of an approximately rectangle-shaped plate member, and a needle 2a for lancing the skin, which is provided at the head of the connector 2b, i.e., in the vicinity of the center of a semi-circular-shaped shorter side of the connector 2b having two shorter sides. In the vicinity of the center of two longer sides of the connector 2b, small-sized fine projections 2c are formed at right angles from the respective longer sides, and these fine projections 2c have, on their upper surfaces, fine concave portions 21a and 21b (concave portions for locking, locking members) which are somewhat long from side to side and have semi-cylindrical-shaped bottom surfaces. Reference numeral 1 denotes a sensor for analyzing the extracted bodily fluid. The sensor 1 has an internal cavity 1a in which the lancet 2 is slidably housed. The sensor 1 has, at the ceiling of the cavity 1a, fine convex portions 61a and 61b (convex portions for locking, locking members) which are somewhat long from side to side and have semi-cylindrical-shaped surfaces, to be engaged with the fine concave portions 21a and 21b provided on the fine projections 2c of the lancet 2, respectively. Reference numeral 1a denotes a cavity formed in the sensor 1. The cavity 1a has a width a little larger than the width of the lancet 2, and has a pair of concave grooves 60a that project from two longer sides of the cavity 1a, in the width direction, correspondingly to the fine projections 2c of the lancet 2. Reference numeral 2a denotes a needle for lancing the skin, which is provided at a front end 2e of the lancet 2, i.e., in the vicinity of the center of a somewhat-rounded shorter side (head side) of two shorter sides of the lancet 2. Reference numeral 10 denotes a lancet-integrated sensor, in which the lancet 2 and the sensor 1 are integrated with each other. [0206] FIG. 8(b) is an exploded perspective view illustrating an example of a lancet-integrated sensor according to the second embodiment of the invention. [0207] As shown in FIG. 8(b), the lancet-integrated sensor 10 is constituted by placing the lancet 2 between a cover 6 and a substrate 7 which are components of the sensor 1, and bonding the cover 6 and the substrate 7 together. [0208] The cover 6 has a groove 6a whose outline shape is a little larger than the lancet 2, and the groove 6a forms a cavity 1a in which the lancet 2 is to be housed slidably along its longitudinal direction. In the groove 6a, concave grooves 60a for restricting a region where the lancet 2 is slidable are formed on the rear of the longer sides of the groove 6a so that a part with the concave grooves 60a becomes a little wider than the other part of the groove 6a, and the length of each concave groove 60a in the transverse direction is set according to the length of the fine projection 2c of the lancet 2. [0209] Further, as described above, the fine concave portions (projections) 21a and 21b of the lancet 2 are formed on the upper surfaces of the fine projections 2c which are formed in the vicinity of the center of the longer sides of the lancet 2, in positions most distant from the needle 2a, i.e., in the vicinity of the edges of the projections 2c on the opposite side from the needle 2a. The fine convex portions 61a and 61b of the sensor 1 are formed in the ceilings of the concave grooves (hollows) 60a of the cover 6, in positions most distant from the needle 2a when the lancet-integrated sensor is assembled, i.e., in the vicinity of the edges of the concave grooves 60a on the opposite side from the needle 2a. [0210] Although the positional relationship between the fine concave portions 21a and 21b and the fine convex portions 61a and 61b may be other than mentioned above, these portions must be arranged with a predetermined positional relationship such that the needle 2a of the lancet 2 is housed in the sensor 1 when the fine concave portions 21a and 21b of the lancet 1 are engaged with the fine convex portions 61a and 61b of the concave grooves 60a of the cover 6. [0211] Further, the front end of the cover 6, i.e., the shorter side of the cover 6 facing the needle 2a of the lancet 2, is semi-circular in shape, and a groove 6b an end of which is connected to the groove 6a is formed at the front end of the cover 6 so that the needle 2a at the front end 2e projects from the sensor 1, and the other end of the connecting groove 6b is an opening 6d of the front end of the sensor 1. An opening 6c is also formed on the rear end of the cover 6, i.e., an end of the cover 6 on the side opposite to the needle 2a of the lancet 2, so that the connector 2b of the lancet 2 projects from the sensor 1, and notches 21a and 21b are formed at two corners of the rear end of the cover 6 so that the electrodes 4 are exposed. [0212] Although the front end of the substrate 7 is semi-circular in shape like the cover 6, the substrate 7 has no notches on the the rear end unlike the cover 6. On the surface of the substrate 7, two electrode terminals 4 are formed at the two corners of the rear ends of the longer sides, and a pair of electrodes 8 connected to the electrode terminals 4 by wiring are formed in the vicinity of the center of the semi-circular part on the front end of the substrate 7. Further, a reagent layer (not shown) is formed on the surface of the electrodes 8. The lancet-integrated sensor 10 is completed by bonding the cover 6 to the substrate 7, with the lancet 2 being housed in the groove 6a of the cover 6 as described above. [0213] A protection cover 3 is fitted to the lancet-integrated sensor according to the second embodiment of the invention as shown in FIGS. 2(a) and 2(b). Further, the measuring device for the lancet-integrated sensor according to the second embodiment of the invention has the same outward shape as that shown in FIG. 3. The internal structure of the measuring device is the same as that shown in FIGS. 4(a) and 4(b) and FIGS. 5(a), 5(b), and 5(c). [0214] Next, a series of measuring operations of the lancet-integrated sensor and the measuring device which are completed as described above, will be described. [0215] Initially, an operation of attaching the lancet-integrated sensor to the measuring device will be described. In the state where the lancet-integrated sensor is not used, the lancet 2 is placed in such a position that the needle tip projects from the sensor 1, and the needle tip is covered with the protection cover 3, as shown in FIG. 2(a). The protection cover 3 is composed of a tube 3b as a needle housing part, and an approximately-square-shaped grip part 3a. The user holds the wide grip part 3a of the protection cover 3, and inserts the rear end of the connector 2b of the lancet 2 (the end of the lancet 2 opposite to the needle) from the opening 13a of the insertion slot 13 of the measuring device 11, as shown in FIG. 2(a). [0216] At this time, as shown in FIG. 5(a), the rear end of the connector 2b of the lancet 2 is guided by the guide (guide member) 17 in the measuring device 11, and goes toward the concave portion 19a of the front end of the connector receiver 19. The connector receiver (lancet pushing member) 19 is pressed in opposite directions by the coil spring 18 and the torsion spring 21, and stands still in the position where the pressing forces are balanced. [0217] As the user continues to insert the lancet-integrated sensor 10 with the lancet 2 being covered with the protection cover 3, initially the lancet 2 is gradually inserted together with the sensor 1 to reach the position where it contacts the ejection lever 15 that is united with the slide button 14. Thereafter, when the slide button 14 reaches the end of its movable range (display 13 side) that is restricted by the termination member 17a of the guide 17, the sensor 1 stops its backward movement. On the other hand, the lancet 2 moves back in the sensor 1 while the user pushes the protection cover 3. [0218] When the lancet 2 reaches an end of its movable range in the sensor 1, the fine concave portions 21a and 21b of the lancet 2 are engaged with the fine convex portions 61a.and 61b of the cover 6 of the sensor 1 as shown in FIG. 2(b), whereby the lancet 2 is locked with respect to the sensor 1. At this time, the rear end of the lancet 2 is engaged with the concave portion 19a of the connector receiver 19, and the connector receiver 19 moves back as the user continues to push the |