PROBLEM TO BE SOLVED: To provide a medical paste kneading injector that facilitates attachment and detachment of a stopper for extrusion to and from an outer peripheral surface of a shaft part.SOLUTION: A medical paste kneading injector 1 includes a cylinder 2, a partition tool 21 capable of sliding inside the cylinder 2 in the axial direction D1, a shaft part 22 inserted into a through-hole 26 of the partition tool 21 capable of performing a reciprocating movement and a rotational movement, an agitation part 23 provided at one end 28 of the shaft part 22, and a handle part 24 provided to the other end 29 of the shaft part 22, and a stopper 5 for extrusion that functions as a spacer for keeping an interval between the partition tool 21 and the handle part 24. The stopper 5 for extrusion includes a stopper body 71 in which a recessed inner surface fitted to an outer peripheral surface 68 of the shaft part 22 is formed, and a finger hook part 72 provided to an outer surface 73 of the stopper body 71 in a protruding manner.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT
