As for stab tool, installation and removal installing in the applied part of the stab device unrestrictedly, it is something which is used. This stab tool, in the longitudinal direction movement is installed the stab needle and the stab needle which possess the needle hub which is adhered to the basic end of the needle body and the needle body where the tip of the sharp needle is provided in the point possibly in the casing, and the casing which movement possibly are received moving vis-a-vis the casing, has with the extended section which can extend the length of basic edge side of the casing, non extended when the extended section has not been extended, normal installation becomes possible in the stab device, extended when the extended section has extended, in the stab device normal installationIn order to become impossible, it is constituted.穿刺具は、穿刺装置の装着部に着脱自在に装着して用いられるものである。この穿刺具は、先端に鋭利な針先が設けられている針体と、針体の基端部に固着された針ハブとを有する穿刺針と、穿刺針をその長手方向に移動可能に収納するケーシングと、ケーシングに移動可能に設置され、ケーシングに対して移動して、ケーシングの基端側の長さを延長し得る延長部とを備え、延長部が延長していない非延長状態では、穿刺装置に正常な装着が可能となり、延長部が延長した延長状態では、穿刺装置に正常な装着が不可能となるよう構成されている。
