A puncture needle cartridge (102) comprising: a lancet (204) having an elongated lancet body (203) having a puncture needle (301) at one end and a part to be held by a puncture device ( 101) at the other end, and a puncture needle cover (202) to protect the puncture needle (301)； and a cylindrical puncture needle holder (201) for holding the lancet body (203) so that the lancet body (203) can move in the support (201), characterized in that four linear grooves (404) are formed for guiding the movement of the lancet body (203) into the cylindrical puncture needle holder (201) and extending in its axial direction from a first end (401) partially to a second end (405) of the support (201) of puncture needle, the lancet body (203) has: an elastically deformable arm means (302) for restricting the movement of the lancet body (203) in relation to the cylindrical puncture needle holder (201) in a position where the puncture needle (301) does not protrude from the puncture needle holder (201)； a first convex part (303) to engage the grooves (404)； and a second convex part (304) located in a position outside the second end (405) of the cylindrical puncture needle holder (201) when the lancet body (203) is stored in an internal diameter part (205) of the support (201) of a cylindrical puncture needle, the grooves (404) reach a terminal surface of the first end, so that the lancet body (203) can be inserted from the first end (401) into the needle needle holder (201) cylindrical puncture, the second convex part (304) has a level difference on the side that has the puncture needle (301) and has a shape in which the height from the central axis of the lancet body (203) decreases towards the end of the side that does not have the puncture needle (301), as well as also comprises an elastically deformable material, and the rear end of the arm means (302) and the first convex part (303) can come into contact with a piece of contact provided in a part of e Rear end of the cylindrical
