The object of the present invention is to suppress a decrease in the optical function of a sleeve by ensuring that a liquid chemical substance is not apt to remain on a peripheral surface of the sleeve even when the liquid chemical substance enters a connector. The present invention relates to an optical connector which is connected to an optical plug holding an optical fiber to a terminal end ofwhich a ferrule is attached. The optical connector of the present invention has a guide pipe 42 into which a ferrule is inserted and on an inner circumferential surface of which a supporting portion (a convexity 43) is formed, a light-emitting device, a light-deceiving device, and a sleeve 35 which is positioned by the supporting portion and optically connects the light-emitting device, the light-receiving device and the optical fiber. According to the present invention, there is a space 44 between the guide pipe 42 and the sleeve 35 and, therefore, the phenomenon that a chemical substance adheres to a wide area and remains does not occur.