Provided is an electric connector mounted on a circuit board, including: a housing including a fitting portion fitted to a mating connector; a plurality of terminals disposed on the fitting portion; and lock metal fittings including an elastic portion and preventing separation of the mating connector, wherein the housing includes accommodating portions at both ends of the housing in the arrangement direction of the terminals to accommodate the lock metal fittings in the accommodating portions, and each of the lock metal fittings includes a fixed portion formed at one end of the lock metal fitting and fixed to the circuit board, a preventing surface formed at the other end of the lock metal fitting and preventing separation of the mating connector, a first folded portion extended from the preventing surface and folded in a substantially U shape, a second folded portion extended in the separation direction of the mating connector from the fixed portion, folded in a substantially U shape, and coming into contact with the first folded portion in the process of fitting of the mating connector, and a pair of projecting portions provided at the distal end of the first folded portion or in the vicinity of the distal end of the first folded portion, projecting in a direction crossing the arrangement direction of the terminals, and coming into contact with contact surfaces formed on the accommodating portion of the housing on the side in the separation direction of the mating connector.