Electrical connector

An electrical connector for being mounted to a printed circuit board, comprising:

• an inner shielding shell looped from a metal plate to define an accommodating chamber therein;
• an insulating housing having a base body engaged with a rear of the accommodating chamber of the inner shielding shell and a tongue portion extended forward from the base portion to stretch into a front of the accommodating chamber, a ring-shaped cavity being opened in a periphery of the base body and perpendicular to the extending direction of the tongue portion for receiving a waterproof washer therein, wherein an outer periphery of the waterproof washer abuts against insides of the inner shielding shell to seal up a chink between the base body and the inner shielding shell;
• a plurality of terminals disposed in the insulating housing;
• and
• an outer shielding shell surrounding the inner shielding shell and electrically connecting with the inner shielding shell, the outer shielding shell having at least one soldering arm soldered to the printed circuit board for achieving a ground function of the inner shielding shell through the outer shielding shell.