An intraocular lens insertion device (10) includes: an installation part (130) in which a deformable intraocular lens (1) is installed, the intraocular lens (1) including an optical part (2) and one or a plurality of support parts (3) extending outward from a periphery of the optical part (2)； a movement part (301) that deforms the support part (3) of the intraocular lens (1) installed in the installation part (130) to move the support part (3) in a direction approaching the optical part (2)； and a deformation suppression part (149, 159) that suppresses deformation of at least part of the support part (3) to be deformed by the movement part (301). With such a configuration, the intraocular lens can be suitably folded and ejected.
