To provide an input device capable of expecting operability improvement when inputting or the like in an image display apparatus.

When a housing 50 is held by a right hand, a protrusion 51 is formed near the thumb position, and arranged on it is a cross operation piece 52 of a cross cursor input device. The housing 50 embeds within it members and circuits for sending data on a movement (operation) amount and direction as well as a button operation as in the inside of a mouse 11 and a cross cursor input device 13, the members and circuits sending the data to a system side according to the operation.