Even if a plurality of CPU boards are installed, removal of the boards is facilitated. A plurality of CPU boards are disposed on the inner side of the left side face of a photographing lens device cover, which has an opening and the shape of a hollow rectangular parallelepiped. When a lens device body is accommodated inside the photographing lens device cover, connectors formed on the photographing lens device cover are connected to respective ones of connectors formed on the lens device body. Communication between the CPU boards and the lens device body becomes possible. Since the CPU boards are disposed on the cover and not on the lens device body, the boards can be removed without disassembling the lens device body.