An implantable electromechanical plug connector is described with a plug part and a socket part, of which the plug part has at least one joining portion which can be inserted completely into a unilaterally open insertion opening within the socket part and has at least one electrically insulating surface having at least one electrode body (6) with a freely accessible electrode surface, and of which the socket part has, inside the unilaterally open insertion opening, an electrically insulating wall portion which laterally delimits the insertion opening at least in part and whose surface makes available at least one counterelectrode body with a freely accessible counterelectrode surface, wherein the electrically insulating wall portion of the electrically insulating surface of the joining portion of the plug part, in the state of complete insertion of the plug part's joining portion in the insertion opening, is oriented in such a way that the counterelectrode surface touches the electrode surface, wherein the at least one electrode body (6) is raised in relation to the electrically insulating surface of the joining portion and/or the at least one counterelectrode body is raised in relation to the surface of the electrically insulating wall portion, and wherein at least one electrically insulating polymer layer is arranged at least in part between the electrically insulating surface of the joining portion and the surface of the electrically insulating wall portion, which polymer layer completely surrounds the mutually touching counterelectrode surface and electrode surface.