A parallax image generator establishes a plurality of projected regions around a display in predetermined intervals and generates a plurality of parallax images having different parallaxes due to being seen from respective points of view. In addition, pixels of the plurality of parallax images occupying the same position are gathered together in a pixel block, and are mapped to rendering memory corresponding to the display. A parallax image display unit displays mapped images in the rendering memory, projects the light from a pixel toward the projected region corresponding to each parallax image per pixel of the plurality of parallax images in each pixel block, and makes a 3-D image observed by positioning both eyes of an observer in adjacent projected regions and projecting the parallax images.