An electrical connector includes an insulative housing; an upper row of contacts and a lower row of contacts parallel to each other. Each contact includes a retention portion, a mating portion and a pressing arm extending from two opposite ends of the retention portion. Each pressing arm includes a bending portion and a contact tail extending from an end of the contact tail. An imaginary central plane defined in the insulative housing about which the mating portions and the retention portions of contacts of the upper row and the lower row are symmetrical. Wherein each pressing arm includes a bending portion extending to the central plane and a pressing portion extending from the bending portion, the pressing portions are overlapped seen from a direction along which the contacts are arranged.