1. An image display apparatus comprising: a display screen; and a display control unit which displays a map image and a real image, which have the same scale and show the same area, on the display screen on the basis of map data and real image data, wherein: the display control unit displays one of the map image and the real image as a background, combines the map image and the real image in a predetermined region so that the other is seen through the one in at least a part of the predetermined region, and displays the combined image in the predetermined region.