A control section 10 makes a judgment about which occupant the menu icon of an operation restricted item is operated by, and thereby makes invalid the operation of a touch panel related to the operation restricted item by an occupant on a driver's seat side while a vehicle is moving by using any means of the operation of a push switch 171 provided at a position where only an occupant on a passenger seat side can operate; the touch operation or drag-and-drop operation of a marker of any shape displayed at any position of a passenger seat side screen; monitoring by an infrared sensor array 164 disposed in the peripheral portion of an LCD panel 162; and monitoring the occupant on the driver's seat side by a monitoring camera 172 disposed at a position where the camera can monitor the direction toward which the face of the driver's seat side occupant is facing.