A display device includes a display unit in which pixels having first and second regions are arrayed in a matrix, the first region emitting first color light for displaying a stereoscopic image including images of a plurality of viewing points and the second region emitting second color light in order to display the stereoscopic image. A separation unit separates optically the images of the respective viewing points from each other so that the images of different viewing points are observed by different eyes of a viewer, wherein in a region on the display unit in which the image of a predetermined viewing point is displayed, widths of the first and second regions in a parallax direction of the stereoscopic image are approximately the same and widths of the first and second regions in a vertical direction, which is approximately perpendicular to the parallax direction, are different.