A camera unit includes an image sensor, a circuit board in which a signal processor circuit to process an output signal of the image sensor is formed, a cable including a signal conductor element and a ground conductor element and connected at one end to the circuit board, and a shielding component formed to enclose the circuit board therewith. The ground conductor element is connected to both a ground terminal of the circuit board and the shielding component in a vicinity of the end of the cable.