An electrical connector (100) includes a base (3), which is shaped in a basin and comprises at least one elastic assembly (35). A first connector module (5) and a second connector module (6) are both assembled on the base and they are electrically connected to each other. Each connector module communicates with an outside complementary connector. The electrical connector comprises an inner cover (2) which is attached to the base and the inner cover defines a plurality of fixing slots (21). The electrical connector further comprises a top cover (1) which forms a plurality of fixing members (17, 17′) thereof and the fixing members correspond to the fixing slots of the inner cover. The fixing members are engaged with or separated from the fixing slots by a rotation of the inner cover along a clockwise or counterclockwise direction by virtue of the elastic assembly.