To provide an optical connector capable of reducing a space for optical coupling.

When a rotating operation of a cap 9 is performed, with the cam holes 24, 24 of the cap 9 inserted onto the projecting pins 23, 23 of a cylinder part 8, the flange 12 of a ferrule 2 is elastically pressed with the contact face 29 of the cap 9 and pushed into the depth of the cylinder part 8. Since the cap 9 is a member rotating around the ferrule 2, it requires no large space in the axial direction of optical fibers 3, 3 for the purpose of optical coupling. The contact face 29 of the cap 9 comes in elastic contact with the flange 12 of the ferrule 2 and forces the ferrule 2 down.