An electrical connector includes a dielectric housing, a plurality of terminals and a shield. The dielectric housing defines a plurality of terminal grooves therein for receiving the terminals. At least one recess is formed in an outer surface of the dielectric housing. The shield has a plurality of sidewalls to define a receiving space therebetween for receiving the dielectric housing therein. At least one of the sidewalls is punched inward at a portion corresponding to the recess of the dielectric housing to form a retaining portion restricted in the recess after the dielectric housing is mounted in the receiving space. The retaining portion is restricted in the recess for fixing the dielectric housing inside the shield. The depth of the recess and the retaining portion restricted in the recess is not limited by the depth of the material of the shield. The dielectric housing is fixed in the shield firmly.