Abstract: An electrical connector comprises a housing defining a basic portion and a mating portion extending forwardly from the basic portion, the basic portion comprising a main portion and a pair of arms extending rearwardly from the main portion, a first slot being defined on an inner surface of each arm; a spacer having a lower portion, a pair of retaining portions receiving in the first slots and a supporting portion located on the retaining portion; a plurality of terminals received in the housing and each terminal defining a soldering portion located on the supporting portion; and a rear cover located between the arms and defining an upper wall, a rear wall and a pair of lateral walls, each lateral wall defining a rib received in the arm. The supporting portion is located between the lower portion of the spacer and the upper wall.