A detector (60) is supported on a lock arm (15) of the housing (10) movably between a standby position and a detection position. The detector (60) includes restricting portions (69) and the housing (10) include escaping portions (28). The escaping portions (28) extend in a direction intersecting a connecting direction, and the restricting portions (69) are inserted therein when the detector (60) is inclined in a connecting process and brought into contact with a wall surface facing in a moving direction of the detector (60) to prevent the detector (60) from reaching the detection position while being kept in an inclined state when the detector (60) moves from the standby position toward the detection position.