A connector includes a housing having a housing body, a lock arm and a protective wall. The lock arm includes a swingable arm, a lock claw and a locking projection. The protective wall includes a turn-up preventing projection projecting toward the swingable arm, the turn-up preventing projection being provided such that the locking projection is disposed between the housing body and the turn-up preventing projection and such that the locking projection and the turn-up preventing projection overlap each other in a direction in which the swingable arm swings. With respect to the fitting direction, a front end surface of the locking projection and a front end surface of the turn-up preventing projection are flush with each other and a rear end surface of the locking projection and a rear end surface of the turn-up preventing projection are flush with each other.