A one-piece intraocular lens realizing adhesion of the intraocular lens to the inner surface of a capsule more advantageously by viscosity imparted to the intraocular lens, and being deployed more positively after it is inserted into the capsule and secured therein while being positioned at a specified location. The intraocular lens has an optical portion (12) and supporting portions (16, 16) that are formed integrally with a soft material exhibiting viscosity, wherein viscosity reducing portions (32, 32) having irregularities are formed on at least one-end faces of the supporting portions (16, 16) in the longitudinal direction.
