An intraocular lens insertion device capable of folding an intraocular lens into a predetermined shape without giving a local stress to the intraocular lens. The intraocular lens insertion device 2 may include a lens disposing part 15 for disposing an intraocular lens 4, a slider 7 for pushing out the intraocular lens 4, a plunger 8 for further pushing out the intraocular lens pushed out by the slider 7, a transition part 31 for deforming the intraocular lens 4 pushed out by the slider and the plunger, and a nozzle 32 for ejecting out the deformed intraocular lens 4.