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 disposed under the induction heating area and the cooking device area ; - first and second inverter circuits respectively adapted to supply high-frequency currents to the first and second magnetic field generators so as to generate high-frequency magnetic fields; and - a controller adapted to control the first and second inverter circuits , 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 , 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 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 disposed under the induction heating area and the cooking device area ; - first and second inverter circuits respectively adapted to supply high-frequency currents to the first and second magnetic field generators so as to generate high-frequency magnetic fields; and - a controller adapted to control the first and second inverter circuits , - 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 , <EOS>