An endoscope is provided that includes: an image pickup device mounted in a distal end portion of an insertion portion wiring that transmits a power supply having a plurality of different power supply voltages for driving the image pickup device, a drive signal that drives the image pickup device, an image pickup signal that is outputted from the image pickup device that is driven by the drive signal, and a ground level a substrate on which a connector that relays the wiring is provided a voltage comparing portion that compares the plurality of different power supply voltages and power supply control means that controls a supply of power to the image pickup device based on a comparison result of the voltage comparing portion.
