An intraocular lens insertion device (10) having a novel configuration in such a manner that, with the displacement of a haptic (20b) toward the convex side of an optical portion (18), which can be deformed in a curved shape, restricted by an engaging part (86) provided to the tip part (84) of a plunger (16), the haptic (20b) is deformed in a curved shape in the direction in which the haptic (20b) approaches the optical portion (18). The configuration allows, when the intraocular lens (12) is pushed out by the plunger (16), the haptic (20b) to enter a gap formed on the concave side of the optical portion (18) which has been deformed in a curved shape.
