Electric connector combination

An electric connector combination comprises a first connector and a second connector which is in butt joint with the first connector. The first connector comprises an insulation body, several terminals which are fixed on the insulation body, and a metal housing which coats the insulation body to form a holding cavity. The insulation body is provided with a butting tongue plate which extends forwards into the holding cavity, and each terminal is provided with a contact portion which is exposed on the surface of the butting tongue plate. The second connector comprises an insulation substrate, several terminals and a metal housing which is attached to the periphery of the insulation substrate, the insulation substrate is provided with a butting cavity used for holding the butting tongue plate, and each terminal of the second connector is provided with a contact portion which is exposed in the butting cavity. The metal housing of the first connector is provided with a clamping member at the rear side of the holding cavity, and the insulation substrate of the second connector is provided with a through gap in the front edge. When the first connector is in butt joint with the second connector, the clamping member of the first connector clamps a part structure, of the metal housing of second connector, corresponding to the gap.