An electrical connector (100) assembled into a hinge (200), includes an insulative housing (1) defining a receiving cavity (110) running through a mating face (114) thereof and a plurality of contacts (2, 3) received and retained in the housing. The housing defines a plurality of receiving grooves (1251, 1252, 1253) running through a rear face (125) opposite to the mating face and communicating with the receiving cavity and at least one arc shaped side face (113) connecting with the mating face. The contacts are received and retained in the corresponding receiving grooves. Each of the contacts (2) defines a retaining portion (21), a contacting portion (22) extending forwards from the retaining portion and projecting into the receiving cavity, and a soldering portion (23) extending downwards from the retaining portion and received in the hinge.