Abstract: A plug connector includes a lower terminal module, an upper terminal module and an insulating housing. The lower terminal module includes a lower insulator and a plurality of lower terminals integratedly molded in the lower insulator, each of the lower terminals has a lower contact portion beyond a bottom face of the lower insulator. The upper terminal module is engaged with the lower terminal module, includes an upper insulator and a plurality of upper terminals integratedly molded in the upper insulator, each of the upper terminals has an upper contact portion beyond a top face of the upper insulator. The insulating housing is integratedly molded outside the lower terminal module and the upper terminal module, each lower contact portion is exposed from a bottom face of the insulating housing, each upper contact portion is exposed from a top face of the insulating housing.