According to one embodiment, a head-separated camera device includes an imaging unit, a control unit configured to control the imaging unit and a connection unit configured to connect the imaging unit and the control unit. The imaging unit includes a sensor configured to capture an image to provide a video signal, a superimposition module configured to superimpose, on serial data, the video signal, the synchronization signal, and the clock signal, the serial data serving to reproduce the image captured by the sensor, and a transmitter configured to transmit the serial data to the control unit. The control unit includes a receiver configured to receive the serial data and a separation module configured to separate the serial data received by the receiver, into the video signal, the synchronization signal, and the clock signal.