Electrical plug connector, electrical mating plug connector and electrical plug connection device

An electrical plug connector, an electrical mating plug connector and an electrical plug connection device. The electrical plug connector (2) has an outer conductor contact element (5) and an inner conductor contact element (4) which extends at least partially through the outer conductor contact element. The inner conductor contact element has an inner conductor-side contact region (7) and the outer conductor contact element has an outer conductor-side contact region (8). The inner conductor-side contact plane (13) oriented transversely to the insertion direction is spanned by a plurality of contact points of the inner conductor-side contact region, which contact points are provided for contacting corresponding contact points of the inner conductor mating contact element (11). An outer conductor-side contact plane (14) oriented transversely to the mating direction is defined by contact points of the outer conductor-side contact region, which contact points are each set as corresponding contact points for cont