An electrical connector (100) includes an insulating housing (1) and a plurality of electrical contacts (2) received therein, the insulating housing (1) includes a top surface (11), a bottom surface (10), a plurality of passageways (110) and a pair of blocks (12) extending toward each other from the inner surface of the passageway (110), each of the electrical contacts (2) includes a body portion (20) positioned in the insulating housing (1), the blocks (12) locate under the body portion (20) of the electrical contact (2), the electrical connector (100) further includes adhesive (3) pasted on the inner surface of the passageway (110), after the electrical contacts (2) are assembled to the insulating housing (1), the electrical contacts (2) touch with the adhesive (3) to position the electrical contacts (2) on the insulating housing (1).