Abstract: A receptacle connector comprising an insulative housing having a base portion; a plurality of terminals retained in the insulative housing; and a shielding shell assembled on the insulative housing. The shielding shell comprises a pair of sidewalls opposite to each other and forming a mating cavity therebetween. The insulative housing further including an alignment wall extending into the mating cavity from the base portion to partition the mating cavity into a number of mating openings, one of the mating opening having a shape different from another. Wherein at least one of the sidewalls has a bent portion bent from a front edge thereof, and the bent portion defines a hook at the tip thereof for adapting to retention at least one hole of the alignment wall of the insulative housing. Therefore, the strength of the receptacle connector may be improved.