An electrical connector comprising a frame (20; 120; 160) and a connector main body (40; 140; 180) received in the frame (20; 120; 160), the electrical connector having: a lock arm (26; 141) that is formed on any one of the frame (20; 120; 160) and the connector main body (40; 140; 180); and a lock receiving part that is formed on the other of the frame (20; 120; 160) and the connector main body (40; 140; 180) and is configured to be engaged with the lock arm (26; 141), and the lock arm (26; 141) and the lock receiving part being disengageable by insertion of a working jig, wherein the frame (20; 120; 160) and the connector main body (40; 140; 180) have a movement path in which the working jig is moveable back and forth, the connector main body (40; 140; 180) has a jig receiving surface at an end of the movement path, and the working jig is configured for disengaging the lock arm (26; 141) and the lock receiving part from each other in the course of movement in the movement path and for pushing the jig receiving surface to separate the connector main body (40; 140; 180) from the frame (20; 120; 160) wherein the frame (20; 120; 160) has a frame main body having a connector receiving cavity for receiving the connector main body (40; 140; 180), the frame main body has an opening on one side in the width direction of the frame (20; 120; 160), and the connector main body (40; 140; 180) is insertable into the connector receiving cavity through the opening; a jig insertion hole (25; 121) is formed in a side wall of the frame main body opposite to the opening; and the working jig is insertable into the frame and the connector main body (40; 140; 180) through the jig insertion hole (25; 121). a lock arm (26; 141) that is formed on any one of the frame (20; 120; 160) and the connector main body (40; 140; 180); and a lock receiving part that is formed on the other of the frame (20; 120; 160) and the connector main body (40; 140; 180) and is configured to be engaged with the lock arm (26; 141), and the lock arm (26; 141) and the lock receiving part being disengageable by insertion of a working jig, wherein the frame (20; 120; 160) and the connector main body (40; 140; 180) have a movement path in which the working jig is moveable back and forth, the connector main body (40; 140; 180) has a jig receiving surface at an end of the movement path, and the working jig is configured for disengaging the lock arm (26; 141) and the lock receiving part from each other in the course of movement in the movement path and for pushing the jig receiving surface to separate the connector main body (40; 140; 180) from the frame (20; 120; 160) wherein the frame (20; 120; 160) has a frame main body having a connector receiving cavity for receiving the connector main body (40; 140; 180), the frame main body has an opening on one side in the width direction of the frame (20; 120; 160), and the connector main body (40; 140; 180) is insertable into the connector receiving cavity through the opening; a jig insertion hole (25; 121) is formed in a side wall of the frame main body opposite to the opening; and the working jig is insertable into the frame and the connector main body (40; 140; 180) through the jig insertion hole (25; 121).