The purpose of the present invention is to provide a three dimensional image display device capable of preventing the generation of crosstalk. The three dimensional image display device according to the present invention includes a display panel having a plurality of pixels, a backlight capable of partially illuminating the display panel, and a drive circuit for driving the display panel and the backlight. The drive circuit causes the display panel to display a three dimensional image by synchronizing the scanning of the display panel with the scanning of the partial illumination light (Lz) of the backlight.