The game operating device (controller) includes formed in the longitudinal housing, and the housing being caught by parts of the holding hand to be wrapped by the palm of the hand. Direction switch is provided at a position which can be operated by the thumb of the hand holding the holding portion on the upper surface, the start switch and the select switch is provided on its rear. X button 44 and Y button 46 are arranged in addition to the line on the upper surface of the housing. It is provided at the front end of the housing in the longitudinal direction in such a way that the exposed surface from the end - the imaging information arithmetic unit is that the imaging device is the front. It is formed at a position corresponding to the recesses on the lower surface of the direction switch. It includes a bone recess, and two inclined surfaces. A button which can be operated by the index finger of the hand holding the holding portion is provided on the inclined surface of the rear Jin. By processing the image signal obtained by imaging an infrared ray from LED modules by the imaging device, it is possible to obtain an operation signal varying according to the position and / or attitude of the controller.