An electrical connector includes: an insulating housing; plural terminals held on the insulating housing, the terminals are arranged in terminal pairs for transmitting differential signals; and plural shielding sheets held on the insulating housing, each of the shielding sheets includes: at least two walls shielding the terminal pair in at least two directions, and plural elastic pieces extending from the at least two walls in order to cooperate with a mating connector; wherein the elastic pieces of each shielding sheet include an inner elastic piece protruding toward an associated terminal pair and an outer elastic piece protruding away from the associated terminals pair.