A high-current plug-in connector for transmitting electrical currents, having a housing made of electrically conducting material, designed to mechanically and electrically connect to a cable, the housing having at least one open side for inserting a mating plug-in connector made of an electrically conducting material, and forming a chamber for accommodating the mating plug-in connector, and at least one contact element, which is arranged on the housing and designed so that the contact element establishes an electrical contact having a contact area and a contact pressure between the housing and the mating plug-in connector inserted into the housing, wherein the contact element is designed as a coil spring.