An electrical connector (100) includes an insulated housing (1), a number of terminals (2) arranged into two rows and received in the insulated housing respectively and a metal shell (3) pre-assembled with the insulated housing via coupling device. The insulated housing (1) comprises a front wall, a back wall, a bottom wall and a pair of lateral walls interconnecting with the front, the back and the bottom walls to define a hollow. The metal shell (3) comprises a front side, a rear side and a pair of transversal sides joining to the front and the rear sides to define a receiving space (30). The lower section of the receiving space is used for housing the insulated housing and the upper section of the receiving space is adapted for receiving the complementary connector.