An electrical connector (100) electrically connects a first IC package (800) having a first width and a second IC package (900) having a second width different from the first width. The electrical connector includes an insulative housing (2) defining a number of contact recesses (20), a number of contacts (3) inserted in the contact recesses, a connecting member (4) mounted on the insulative housing, and a number of guiding members (6) assembled to the connecting member for guiding the first IC package in the connecting member at a first state, and detachable from the connecting member for facilitating insertion of the second IC package in the connecting member at a second state.