An electrical connector adapted for mounting to an upper surface of the printed circuit board, includes a contact module having an insulative housing with a plurality of contacts disposed therein and enclosed within an inner metallic shell, and an outer metallic shell attached to the inner shell and located between the inner shell and the printed circuit board so as to allow the raised type mating cavity which is formed by the inner shell. The contact module includes a metallic shielding plate with an oblique section. The housing forms an oblique section on the rear side to comply with the oblique section of the shielding plate wherein a receiving space is formed above a rear side of the connector and in alignment with a mating cavity of the inner shell in the front-to-back direction.