Patent ID: 8801679

Claim:
A medication administering device for having a preparation syringe containing a preparation mounted thereto, and for administering the preparation to a living body, said device comprising: a substantially cylindrical syringe cover having an outer peripheral face, a substantially cylindrical inner peripheral face side and being configured to support the preparation syringe on the substantially cylindrical inner peripheral face side of the substantially cylindrical syringe cover; a substantially cylindrical piston configured to press on a rear end of the preparation syringe; a piston case surrounding the substantially cylindrical piston, being configured to guide the outer peripheral face of the substantially cylindrical syringe cover in the direction of the substantially cylindrical piston on the substantially cylindrical inner peripheral face side, and being configured to be mounted in a state in which the syringe cover is removable; a housing having an inner peripheral surface surrounding the piston case, and being configured to move the piston case forward in a puncture direction along the inner peripheral surface along with the syringe cover when the rear end of the preparation syringe is pushed by the piston; and a syringe cover detector configured to detect if the syringe cover has been mounted to the piston case.