There are provided a connector of which manufacture and maintenance are easy and an endoscope system. A connector is a connector for an endoscope that is connected to a light source device. The connector includes a light guide part that guides illumination light, a wireless communication unit that wirelessly communicates with the light source device, a wireless power receiving unit that wirelessly receives power supplied from the light source device, and a housing that is formed in a flat shape in which a horizontal length is longer than a vertical length in a connection posture where the connector is connected to the light source device. The light guide part, the wireless communication unit, and the wireless power receiving unit are provided on a front surface of the housing, which faces the light source device, so as to be lined up in a horizontal direction.