A connector which makes it possible to positively maintain a locked state of an actuator, even if a flat cable is pulled. The actuator is mounted on a housing in a manner pivotally movable between an open position for accommodating a front end of an FPC in an accommodating space and a closed position for pressing the front end of the FPC against contact portions of contacts. Locking members are mounted on the housing in a manner slidable between a locked position for inhibiting the actuator in the closed position from opening and an unlocked position for allowing the actuator to open, along a direction of arrangement of the contacts.