To solve the problem of enlarging a camera and bringing up the cost with the provision of a battery or a large capacity capacitor exclusively for backing up in a camera.

In the camera in which a remote control device 12 can be contained inside the camera main body 1, back up power is fed from a power source 21 provided inside the remote control device 12 to the camera main body 1 (clock circuit 7 and memory 9) to hold specified information inside the camera main body 1 when the remote control device 12 is contained.