An IC socket (1) for receiving an IC package includes an insulative housing (2) with a plurality of passageways (20) thereof and a plurality of contacts (3) mounted within the passageways (20) of the insulative housing (2) respectively. The contact (3) has a base section (30), an upward contact arm (31) and a downward contact arm (32) respectively extending from the base section (30), and a pair of retaining arms (33) extending from opposite sides of the base section (30). The retaining arm (33) includes an elastic section (330) engaging with an inner wall of the passageway (20) and an opening (332) adjacent to the elastic section (330).