1. An image pickup lens for use in an image pickup device for restoring an image detected by an image sensor, wherein the image pickup lens comprises at least one lens, the image pickup lens includes, on at least one lens surface of the at least one lens, a multifocal lens surface having a plurality of surface areas having different focal points, an aperture stop is placed adjacent to the multifocal lens surface, and one of any two of the areas of the multifocal lens surface is shifted relative to the other of the any two of the areas along the direction of the optical axis so that light rays that respectively pass through the any two of the areas have a certain phase difference.