1. An image display apparatus for a vehicle, a seat of a driver of which is adjacent to a first side, which is one of a right side and a left side of the vehicle, the apparatus comprising: a first camera for producing first image data corresponding to a first outer region rearward of the vehicle; a second camera for producing second image data corresponding to a second outer region outward of a second side opposite to the first side of the vehicle, the second outer region having an overlap with the first outer region; a display arranged inside the vehicle for displaying an image of a part of the first outer region and the second outer region; an image processing unit for processing the first image data and the second image data to produce processed image data corresponding to an integrated region, which includes a part of the first outer region and the second outer region without the overlap and is viewed by an artificial sightline of the driver, which is assumed to pass through the display to reach the integrated region so that the integrated region is visible for the driver; and a display control unit for causing the display to reproduce an image of the integrate region using the processed image data.