An image display device includes a display panel and a parallax optic. The display panel is provided with a stripe sub-pixel arrangement in which sub-pixels arranged in a first direction have identical colors, and sub-pixels arranged in a second direction have distinct colors. The pixel density in the first direction is twice the pixel density in the second direction of the stripe sub-pixel arrangement. The parallax optic has view-separation elements arranged in the first direction into multiple rows. Each view-separation element is positioned corresponding to two adjacent sub-pixels, and the view-separation elements in one row are staggered relative to the view-separation elements in immediately adjacent rows.