IN VEHICLE INFORMATION DISPLAY DEVICE AND INFORMATION DISPLAY METHOD

In a vehicle interior, a first navi-display (10) and a second navi-display (20) are arranged beforehand. It is determined whether or not a content displayed on the first navi-display (10) and a content displayed on the second navi-display (20) are identical to each other. When it is determined that they are identical to each other, the content that has been determined to be identical and that was displayed earlier on either one of the first navi-display (10) or the second navi-display (20) is changed to another content associated beforehand with the content that has been determined to be identical.