A connector (10) has first and second housings (20, 40). The first housing (20) has a tubular hood (21) with opposite first and second surfaces and the second housing (40) can be fit in the tubular hood (21). A terminal fitting (80) and a retainer (60) are mounted in the second housing (40). A guide (29) projects from the second inner surface of the hood (21), and a striking part (27) projects from the first inner surface of the hood (21). The second housing (40) slides along the guide (29) in a process of fitting the second housing (40) in the hood (21) and is displaced toward the striking part (27). The retainer (60) projects from the second housing (40) prior to complete insertion and will strike against the striking part (27) to prevent the second housing (40) from fitting farther into the hood (21).