An intraocular lens insertion tool (10, 130) with a tool body (12) for accommodating an intraocular lens (14) and adapted to insert into an eye the intraocular lens (14) through displacement of the lens (14) in an axial forward direction by a plunging member (16), and to push out the lens (14) through an insertion tube section (80) disposed at an axial distal end of the tool body (12). A base plate (31) of a resting portion (24) that houses the lens (14) is provided with side plates (35a, 35b) that respectively project from two widthwise edges of the base plate (31) to both sides in a thickness direction of the base plate (31) thereby imparting to the resting portion (24) a generally "H" shaped cross section. The tool body (12) inclusive of the resting portion (24) and the insertion tube section (80) is integrally formed from light-transmissive synthetic resin material whereby the lens (14) housed within the resting portion (24) is viewable from an outside through the base plate (31).