An electrical socket connector comprises a base (11), a cover (12) movably mounted on the base, and a fastening means (14). The base has a contact receiving portion (111) and a first protruding section (110) at one end thereof. A plurality of conductive contacts are received into the contact receiving portion of the base and each contact has a solder ball (112) attached thereon. The fastening means is assembled on the first protruding section of the base and at least has a soldering portion (141). The soldering portion and the solder balls are soldered on a PCB.