An electronic apparatus includes a receptacle for connecting to a plug is disclosed. The receptacle is located on an outer surface of a chassis of the electronic apparatus. The plug includes a male-side plate-like member having a signal terminal disposed therein is contained in a metal case. The receptacle includes a female-side plate-like member having a signal terminal disposed therein. The female-side plate-like member is configured to protrude from or retreat into the outer surface of the chassis. The plug is connected to the female-side plate-like member at a protruding position at which the female-side plate-like member protrudes from the outer surface of the chassis.