A female housing (20) is provided with a lock arm (30) for holding a mating male connector (M) in a connected state. The lock arm (30) is comprised of an arm (31) extending along forward and backward directions and an actuator (32) extending along a width direction. The arm (31) is resiliently deformed with a support (33) as a supporting point and has a lock (34) engageable with the male connector (M). The arm (31) is displaced in unlocking direction by pressing the actuator (32). Two couplings (35) coupled to the female housing (20) are provided at opposite sides of the actuator (32). The couplings (35) are inclined up towards a widthwise middle (32a) of the actuator (32).