To provide an intraocular lens insertion apparatus having a simple structure and surely preventing the movement of an intraocular lens from an installation part of an intraocular lens introducing tube to an insertion opening side or its disengagement to the outside of the intraocular lens introducing tube.

The inside diameter B of the intraocular lens introducing tube 2 in the insertion opening part 3 is formed smaller than the inside diameter A of the intraocular lens introducing tube 3 in the installation part 5. The inside diameter of the intraocular lens introducing tube 2 is made maximum in the installation part 5 to surely prevent the movement of the intraocular lens from the installation part 5 of the intraocular lens introducing tube 2 to the side of the insertion opening part 3 or its disengagement to the outside of the intraocular lens introducing tube 2.