PURPOSE: To provide an optical fiber male/female common ferrule connector.

CONSTITUTION: This connector is composed of a plug means 22 for housing the end part of an optical fiber, a supporting means 49 for supporting the plug means, a male/female common connector part 35 provided with plural projection parts 40 arranged so as to be mutually engaged with the projection parts of the other connector of the same kind and a fixing means 70 placed around the plug means and the supporting means so as to keep the relation of being arranged side by side with the other connector of the same kind. The fixing means abuts and holds the male/female common connectors 35 together so as to bring the optical fibers terminated by the plug means to optically coupled relation when fingers projected from the supporting means of the connector are engaged with each other.