The invention relates to an electric connector comprising an insulation body and a center terminal, wherein the center terminal is contained in the insulation body; the insulation body is inwards concavely provided with a containing cavity; the center terminal comprises a first fixed holding part and a butting column, wherein the first fixed holding part is fixedly held on the insulation body, the butting column extends into the containing cavity, is in a cylindrical shape and is convexly provided with a convex rib along a circumferential direction; and the convex rib forms a butting part so as to be beneficial to increasing the retention force and the operation handfeel of a butting connector.