A connector housing (10) includes a terminal inserting portion (15) into which deflectable locking lances (23) project, and a retainer mounting hole (26) communicating with the terminal inserting portion (15) and open in one surface facing in a direction intersecting an inserting direction of a terminal fitting (70). A retainer (40) is inserted into the retainer mounting hole (26). The retainer (40) includes a deflection restricting portion (44) configured to restrict the deflection of the locking lance (23) by entering a deflection space (58) for the locking lance (23) with the retainer (40) inserted to a proper depth in the retainer mounting hole (26) and supports (43) capable of supporting the terminal fitting (70) by being located to be able to come into contact with the terminal fitting (70).