An electrode catheter, in particular for cardiac therapy, includes an elongate, tubular catheter body, an electrode for delivering or measuring an electrical signal, in particular an electrocardiac signal, via its external electrode contact surface, at least one first supply line for the electrical connection of the electrode, at least one second supply line for the electrical connection of a further electrode, a plug terminal connection between the at least one first supply line and the electrode, and an insulated passage of the at least one second supply line through the electrode.