An electrical connector having an insulative housing having a mating cavity and a plurality of passageways, a plurality of electrical contacts received in the corresponding passageways and a sealing member received in the mating cavity. The insulative housing defines a front face and a mounting wall, the mating cavity is formed between the front face and the mounting wall. Each electrical contact has a contacting portion, a tail portion, and a main portion connecting the contacting portion with the tail portion, each main portion defines a plurality of barbs on both sides thereof. The sealing member has a base portion and at least one opening defined in the base portion for tail portions passing through. At least one electrical contact defines a wing on one side thereof, and the sealing member is restricted between the wing and the mounting wall.