A lock arm (31) has a lock (34) that rides on a lock projection (62) while connecting two housings (10, 60) and locks the lock projection (62) when the housings (10, 60) are connected. A connection detecting member (45) is movable in the male housing (10) and between an initial position and a detection position. The connection detecting member (45) has a resilient detecting portion (50) capable of contacting the lock (34). First and second restricting surfaces (36, 37) are formed on a facing surface (35) of the lock (34) facing the resilient detecting portion (50). The first restricting surface (36) restricts displacement of the resilient detecting portion (50) in a riding direction on the lock (62) with respect to the lock (34) and the second restricting surface (37) restricts displacement of the resilient detecting portion (50) in a direction opposite to the riding direction on the lock projection (62).