According to one embodiment, a head separation camera apparatus includes an imaging device, a control device and a cable. The control device includes a first controller. The first controller is configured to output the control signal including a selection command to notify a controlled device acting as a control target from one or more controlled devices in the imaging device and control data indicating contents of control of the control target. The imaging device includes a second controller. The second controller is configured to transmit an individual selection command to inform whether or not a device is the control target and the control data to at least the controlled device acting as the control target, based on the selection command.