An image display device capable of preventing screen burning or residual image phenomena is provided. The image display device includes a display which displays an image according to preset pixel output characteristics; a motion detection unit which detects motion of the displayed image; and an output controller which adjusts the pixel output characteristics of pixels corresponding to a still image if at least one portion of the image is determined to be a still image, based on the detection result of the motion detection unit. Therefore, screen burning or residual image phenomena can be effectively reduced.