An optical connector for coupling to a counter-connector mechanically and optically, a portion of an optical transmission line transmitting an optical signal being disposed in the optical connector, includes: a first outer case through which the optical transmission line is inserted and that covers an incidence end or an emitting end of an optical signal through the optical transmission line a cover plate that is permeable to an optical signal and seals a tip end side coupled to the counter-connector in the first outer case and a coating film made of amorphous carbon that is disposed on a surface on the tip end side of the cover plate.
