An electrical connector includes: an insulative housing; plural conductive terminals disposed in the insulative housing; and a shield shell covering the insulative housing, wherein the shield shell has a mating frame opening at a front end thereof, the mating frame opening including a top edge, a bottom edge parallel to the top edge, a first side and a second side respectively perpendicular to a left and a right ends of the top edge, a first connecting edge connected between the first side and the bottom edge, and a second connecting edge connected between the second side and the bottom edge, the first connecting edge has a first angle with respect to the bottom edge, the second connecting edge has a second angle with respect to the bottom edge, and the first angle and the second angle are both obtuse angles.