A three-dimensional image display device including a dot displaying viewpoint images and a viewpoint forming unit. The dot displays first and second color images respectively having first and second colors of a first viewpoint image among the viewpoint images during a first sub-frame, and displays a third color image having a third color of the first viewpoint image during a second sub-frame. The viewpoint forming unit includes viewpoint forming devices, which are positioned at a first position during the first sub-frame to project the first and second color images on a viewing zone corresponding to the first viewpoint image, and positioned at a second position during the second sub-frame to project the third color image on the viewing zone.