The USB female connector contains an insulating base and a shielding casing enclosing the insulating base. On the insulating base, there is mainly a ground terminal having a flat ground contact section at an end on the insulating base. From the ground contact section, the ground terminal is forked into ground extension sections. Through the forked ground extension sections, the crosstalk on the first, second, third, and fourth differential signal terminals by the first and second signal terminals is effectively resolved.