It is an object of the present invention to provide an accommodative intraocular lens capable of effectively exerting a focus adjustment function. An optical portion 10 and a plurality of support portions 20 arranged around the optical portion 10 are provided. The support portion 20 includes an anterior support portion 21 and a posterior support portion 22, and the anterior support portion 21 presses an anterior capsule Sf and the posterior support portion 22 presses a posterior capsule Sb by the elastic force of the support portion 20. When the lens capsule S is in a distance vision state or in a near vision state, as the pressing force of the anterior capsule Sf against the anterior support portion 21 increases or decreases, the anterior support portion 21 deflects backward or returns forward while maintaining the radial position of the base end portion 21a, so that the tip end portion 21b of the anterior support portion 21 moves backward or forward greatly while maintaining the radial position, and the optical portion 10 moves backward or forward accordingly.
