An induction-heating cooker for use with a combined cooker, comprising: - a top plate having an induction heating area and a cooking device area; - first and second magnetic field generators (12, 32) disposed under the induction heating area and the cooking device area; - first and second inverter circuits (14, 34) respectively adapted to supply high-frequency currents to the first and second magnetic field generators (12, 32) so as to generate high-frequency magnetic fields; and - a controller adapted to control the first and second inverter circuits (14, 34), wherein the combined cooker comprises: - an induction-heated part adapted to be inductively heated with a first electric power by the high-frequency magnetic field generated by the first magnetic field generator; - an electric generator adapted to be electromagnetically induced by the high-frequency magnetic field generated by the second magnetic field generator to generate a second electric power; and - a cooking support unit operating by using the second electric power acquired by the electric generator, wherein the induction-heating cooker is characterised by further comprising: - a first detecting unit adapted to detect a load resistance of the induction-heated part of the combined cooker placed on the induction heating area; and - a second detecting unit adapted to detect a load resistance of the electric generator of the combined cooker placed on the cooking device area, wherein based on frequency characteristics of the load resistances detected by the first and second detecting units (15, 35), the controller is configured to determine whether the induction-heated part of the combined cooker is placed on the induction heating area and whether the electric generator of the combined cooker is placed on the cooking device area, and wherein when it is determined that the induction-heated part of the combined cooker is placed on the induction heating area and the electric generator of the combined cooker is placed on the cooking device area, the controller is configured to control the first and second inverter circuits (14, 34) independently of each other such that a food cooked by the combined cooker is heated by the induction-heated part while cooking of the food on the induction-heated part is supported by the cooking support unit. - a top plate having an induction heating area and a cooking device area; - first and second magnetic field generators (12, 32) disposed under the induction heating area and the cooking device area; - first and second inverter circuits (14, 34) respectively adapted to supply high-frequency currents to the first and second magnetic field generators (12, 32) so as to generate high-frequency magnetic fields; and - a controller adapted to control the first and second inverter circuits (14, 34), - an induction-heated part adapted to be inductively heated with a first electric power by the high-frequency magnetic field generated by the first magnetic field generator; - an electric generator adapted to be electromagnetically induced by the high-frequency magnetic field generated by the second magnetic field generator to generate a second electric power; and - a cooking support unit operating by using the second electric power acquired by the electric generator, - a first detecting unit adapted to detect a load resistance of the induction-heated part of the combined cooker placed on the induction heating area; and - a second detecting unit adapted to detect a load resistance of the electric generator of the combined cooker placed on the cooking device area,