There is provided an optical connector adapted to be used as an optical input terminal or optical output terminal. A plug guide hole passing through a generally square-shaped insulation body is formed. An element folder for accommodating an optical element is made of a sheet metal. The element holder comprises a top plate, opposed side plates and a rear plate covering the top surface, the opposed side surfaces and the rear surface of the optical element mounted in the element holder, and a size between the inner surfaces of the opposed side plates is set to a value substantially equal to the maximum value of the corresponding external size of the optical element. In addition, tongues for resiliently sandwiching and holding the optical element are formed in the opposed side plates of the element holder, respectively, and there is provided on the rear plate of the element holder biasing force applying means for applying to the optical element a resilient biasing force that acts, when the element holder is attached to the rear end of the insulation body, to forcedly push the front surface of the optical element mounted in the element holder against the rear end surface of the insulation body.