A socket connector includes a rectangular base plate adapted to be positioned on a circuit board and retaining an electronic device, such as an integrated circuit, thereon for establishing electrical connection between the electronic device and the circuit board by means of contacts retained therein. Bumps are formed on the base plate for engaging with notches defined in the electronic device to precisely positioning the electronic device with respect to the base plate. A retention module includes a frame having four wall segments defining an interior space therebetween for receiving the base plate. A pair of sideways projections is formed on one wall segment with aligned holes defined therein for receiving pivots of a resilient clip thereby making the clip movable between an open position where the base plate is exposed for receiving the electronic device and a closed position where the clip resiliently engages with the electronic device thereby securing the electronic device to the base plate. A pair of sideways projections is formed on an opposite wall segment each having a barb for engaging an opening defined in a corresponding resilient arm of the clip for fixing the clip at the closed position. Each sideways projection forms a bifurcated board lock for being received in a hole defined in the circuit board. A pin is inserted into a bore defined in each sideways projection to expand the board lock thereby securely fixing the socket connector to the circuit board.