An image display device includes an illuminator and a detector. The illuminator is configured to send out light on a road surface around a first vehicle as an own vehicle, to display a first notification image that notifies information to surroundings of the first vehicle. The detector is configured to detect an image displayed on the road surface or information indicated by the image. The illuminator is configured to display the first notification image on the basis of the image detected by the detector or the information indicated by the image.