A connector cover (10) has of two half pieces (20, 30) mounted on a rear of a connector housing (51). Upper and lower ribs (20U, 20L) are formed in one half piece (20) near a rubber plug (60) mounted in a rear end portion of the connector housing (51) at opposite sides of an extension (L) of the axial line of a through hole (61) of the rubber plug 60, through which hole a wire (W) is inserted. The upper and lower ribs define a first wire guide (22) to bend small-diameter wires (W1) drawn out backward from the through hole (61). The connector cover (10) also has a second wire guide (23) for bending the small-diameter wires (W1) bent by the first wire guide (22) in a direction opposite to a bending direction by the first wire guide (22).