An electrical plug connector with an insulating body that holds at least one metallic plug part that comprises at least one solder connection element that can be soldered to a circuit board, and at least one plug connection element for a matching plug part, both of which are connected with each other via a central piece of the plug connection element. The solder connection element may be connected via a tolerance compensation part with the central piece of the plug part, or directly with the plug connection element, in such a way that, relative to the position of the solder connection element—with the solder connection element soldered to the circuit board—the position of the plug connection element can be changed in any direction, parallel to the plane of the circuit board. In addition, the invention relates to a plug connector assembly.