This image display device 100 includes operation members 101, an I/F (interface) for image input 102, a control device 103, a HDD (hard disk drive) 104, and a monitor 105.The operation members 101 include input devices of various types that are actuated by the user, for example a keyboard and a mouse and so on.The I/F for image input 102 is a connection interface for connecting an external image i