A puncture needle cartridge comprising: a lancet (204a,204b) including: a lancet body (203a,203b); a puncture needle (301a,301b); a removable protection cap (202a,202b) covering the puncture needle (301a,301b) and including one of a first convex part and a first concave part (303a, 303b); a connecting part (302a, 302b) that separably connects the lancet body (203a, 203b) and the removable protection cap (202a, 202b); and a puncture needle holder (201a,201b) including: one of a second convex part and a second concave part (401a,401b); wherein the one of the first convex part and the first concave part (303a,303b) and the one of the second convex part and the second concave part (401a,401b) are engaged to restrict movement of the removable protection cap (202a,202b) in an axial direction of the lancet body (203a,203b); characterized in that the one of the first convex part and the first concave part (303a,303b) is formed on an inside portion of the removable protection cap (202a,202b), the one of the second convex part and the second concave part (401a,401b) is formed on an outside portion of the puncture needle holder (201a,201b), a cutout part (405a,405b) and a guide part (402a,402b) are formed on the outside portion of the puncture needle holder (201a,201b), and the removable protection cap (202a,202b) is configured to rotate until the one of the first convex part and the first concave part (303a,303b) contacts with the guide part (402a, 402b) so that the one of the first convex part and the first concave part (303a,303b) pass through the cutout part (405a,405b), so that the removable protection cap (202a,202b) is removed from the puncture needle holder (201a,201b). a lancet body (203a,203b); a puncture needle (301a,301b); a removable protection cap (202a,202b) covering the puncture needle (301a,301b) and including one of a first convex part and a first concave part (303a, 303b); a connecting part (302a, 302b) that separably connects the lancet body (203a, 203b) and the removable protection cap (202a, 202b); and a puncture needle holder (201a,201b) including: one of a second convex part and a second concave part (401a,401b); wherein the one of the first convex part and the first concave part (303a,303b) and the one of the second convex part and the second concave part (401a,401b) are engaged to restrict movement of the removable protection cap (202a,202b) in an axial direction of the lancet body (203a,203b); characterized in that the one of the first convex part and the first concave part (303a,303b) is formed on an inside portion of the removable protection cap (202a,202b), the one of the second convex part and the second concave part (401a,401b) is formed on an outside portion of the puncture needle holder (201a,201b), a cutout part (405a,405b) and a guide part (402a,402b) are formed on the outside portion of the puncture needle holder (201a,201b), and the removable protection cap (202a,202b) is configured to rotate until the one of the first convex part and the first concave part (303a,303b) contacts with the guide part (402a, 402b) so that the one of the first convex part and the first concave part (303a,303b) pass through the cutout part (405a,405b), so that the removable protection cap (202a,202b) is removed from the puncture needle holder (201a,201b). one of a second convex part and a second concave part (401a,401b); wherein the one of the first convex part and the first concave part (303a,303b) and the one of the second convex part and the second concave part (401a,401b) are engaged to restrict movement of the removable protection cap (202a,202b) in an axial direction of the lancet body (203a,203b); characterized in that the one of the first convex part and the first concave part (303a,303b) is formed on an inside portion of the removable protection cap (202a,202b), the one of the second convex part and the second concave part (401a,401b) is formed on an outside portion of the puncture needle holder (201a,201b), a cutout part (405a,405b) and a guide part (402a,402b) are formed on the outside portion of the puncture needle holder (201a,201b), and the removable protection cap (202a,202b) is configured to rotate until the one of the first convex part and the first concave part (303a,303b) contacts with the guide part (402a, 402b) so that the one of the first convex part and the first concave part (303a,303b) pass through the cutout part (405a,405b), so that the removable protection cap (202a,202b) is removed from the puncture needle holder (201a,201b).