An intraocular lens injection instrument (10) for injecting an intraocular lens (IOL) (1a, 1b) including an optical part (2) and support parts (3) into an eye by folding the IOL, comprises: a cylinder body part (30) provided, at its front end, with an injection part (20) configured to internally hold the IOL and inject the IOL into the eye through an incision formed in the eye and a plunger (40) for pushing the IOL out of the injection part, the plunger being placed in the cylinder body part to be movable in an axial direction of the cylinder body part, characterized by a tip end portion of the plunger being formed with a holding part (45) for holding the support parts of the IOL.
