In a small connector, male and female terminals with high reliability of locking can be easily unlocked. A connector housing 10 has a housing body 11 and a cover body 25 mounted on the housing body 11. A hinge 13 is provided to join the bodies integrally. A locking bar 30 for locking a female terminal 35 is formed suspendingly, through an opening 23 of a terminal receiving chamber 12, on an operating flap 28 formed along the same plane of the cover wall 26 by slitting the cover wall 26. A pressing portion 30b is formed at the top end of the locking bar 30 for abutting on a free end 41b of a spring contact piece 41.