An electrical connector comprises an insulative housing (1) comprising a bottom wall (11) and a locking member (131) extending downwardly from the bottom wall (11), a plurality of contacts (4) received in the insulative housing (1) and a fastening device (3) locked with the insulative housing (1) for fastening the electronic package (2) on the insulative housing (1). Thus even if exert an upwardly force on the electronic package (2), the electronic package (2) can also securely located on the insulative housing (1).