A stereoscopic image display device includes: a display panel including a plurality of pixels arranged in a matrix format; and a viewpoint division unit dividing light of a left-eye image and light of a right-eye image displayed by the plurality of dots and transferring the divided light to a plurality of viewpoints corresponding to each dot, wherein the viewpoint division unit includes a plurality of openings and a light blocking unit, and when a horizontal directional width of each of the plurality of openings corresponds to an m number of dots (m is a natural number), a number dots of n adjacent in the horizontal direction displaying the left-eye image and the right-eye image is equal to n=2m+1 or n=2(m+1).
Stereoscopic image display device