The disclosure relates to an electrical plug connector, comprising two housing parts, which are connected in a sealing manner on flat contact surfaces. A first housing part is, on its contact surface, equipped with an annular sealing edge directed at the opposite housing part. A second housing part is, on its contact surface, equipped with an annular seal corresponding to the sealing edge. The housing parts may be unreleasably connected to one another at multiple locations radially outside the seal and the sealing edge.