An image display device includes a display panel, a barrier panel, and a controller. The display panel is configured to be able to form a first display region, to be able to display a right-eye image in a right-eye visible region of the first display region and display a left-eye image in a left-eye visible region of the first display region. The barrier panel is configured to be able to form a first barrier region and to form a light-transmitting portion and a dimming portion in the first barrier region. The controller is configured to display a portion located in the first display region as one parallax image frame including two sub-frames. The controller is configured to form the dimming region in the entire first barrier region during a frame change period including a timing of changing a display from the parallax image frame to a new parallax image frame.