An electrical connector comprises a base plate and a pair of terminal modules, the base plate defines a tongue plate. Each terminal module includes a plurality of terminals and an insulative housing inserted molding with the terminals. A pair of concave portions forms on opposite sides of the tongue plate, the two terminal modules are received in said concave portions respectively. An insulative shell is injection molded over outer sides of the terminal modules and commonly forms a mating plate, the terminals define a contacting portion exposed to two opposite surfaces of the mating plate. Said electrical connector can increase the binding force of the terminal modules and the base plate.