An electrical connector (100) for receiving a central process unit comprises: a first insulative housing (14) defining a number of receiving channels (141) extending along a first direction; a second insulative housing (13) located above the first insulative housing and defining a number of passageways (131) aligned to corresponding receiving channels; a third insulative housing (15) located below the first insulative housing and defining a number of holes (151) extending therethrough and aligned to corresponding passageways; and a number of thin, elongated contacts (11) received in the first, the second and the third insulative housing. Each thin, elongated contact has a contact portion (111) positioned above a top surface of the second insulative housing, a tail portion (112) extending through the holes of the third insulative housing, and a base portion (115) retained in the first and the second insulative housing. The second insulative housing is capable of moving along a second direction above the first housing and each passageway defines an inner sidewall. The base portion of the thin, elongated contact abuts against the inner sidewall of the passageway of the second insulative housing. The contacts can be maintained by the housings to prevent from rotating.