A plug connector includes a main body, a plurality of terminals, an insulating housing and a protecting portion. The main body includes a main plate, a base body assembled to the main plate, and an outer ground shell. The base body has an assembling end, and a connecting end connected with the assembling end. The outer ground shell is mounted around the assembling end. The plurality of the terminals mounted to the base body, include a plurality of ground terminals. Each terminal has a contact portion. The contact portions of the plurality of the terminals are exposed to the connecting end. The contact portion of each ground terminal has a soldering pad fastened to the main plate. The insulating housing surrounds the outer ground shell. The protecting portion surrounds front ends of the contact portions of the plurality of the terminals and a front end of the connecting end.