Electric connector

An electric connector comprises an electric terminal group contained in an insulation body, a metal shell sheathed in the insulation body, and a cable connected with the electric terminal group, wherein the insulation body comprises a body part and a butt joint part extended from the body part, the body part comprises a plurality of terminal slots penetrating from the rear wall to the front wall, a convex wall with symmetrical upper wall and lower wall, and a convex part, the butt joint part is provided with a containing channel, penetrating through the root part to the head part, for connecting the terminal slots, the metal shell comprises a frame body, a bent part extended by the upper wall and the lower wall, and an upper flat panel and a lower flat panel which extend in a manner parallel to the upper wall and the lower wall, the flat panels are provide with square holes, the electric terminal group comprises eight terminals, each terminal comprises a contact part and a holding part extended from the conta