An optical connector receptacle of the invention includes: a receptacle housing holding a ferrule; a flange protruding from an external surface of the receptacle housing; an elastic deformation portion extending from the flange along the external surface of the receptacle housing; and a locking protruding portion protruding from the elastic deformation portion to the opposite side of the external surface of the receptacle housing. The optical connector receptacle is attachable to an attachment wall by sandwiching a peripheral edge of an attachment hole of the attachment wall between the flange and the locking protruding portion. A state where the locking protruding portion is locked by the peripheral edge of the attachment hole of the attachment wall is releasable as a result of elastically deforming the elastic deformation portion to be directed to the external surface of the receptacle housing.
