An endoscope device includes a main body part； a first insertion part having a tubular shape and including a first image sensor, and a first video signal transmission device converting a video output signal into an optical signal, optically transmitting the optical signal to a first proximal end part, and outputting a first video signal to the main body part； and a connector part configured to electrically couple the main body part with the first insertion part, including a main body part connector, and a first insertion part connector, wherein the first video signal is transmitted from the first insertion part to the main body part when the main body part connector is electrically coupled with the first insertion part connector, the first video signal transmission device includes a first photoelectrical converter at the first proximal end part, and the connector part is configured by an electrical connector.
