Induction heating cooker

An induction heating cooker, comprising:

• a first coil;
• a second coil arranged outside the first coil;
• a third coil arranged outside the second coil;
• a first inverter circuit configured to supply a first high-frequency current to the first coil;
• a second inverter circuit configured to supply a second high-frequency current to the second coil;
• a third inverter circuit configured to supply a third high-frequency current to the third coil;
• a controller configured to control driving of the first inverter circuit, the second inverter circuit, and the third inverter circuit;
• and
• a load determining unit configured to determine a material of a heating object placed above each of the first coil, the second coil and the third coil,
• wherein, when a material of the heating object placed above the first coil is a magnetic material and a material of the heating object placed above the second coil and the third coil includes a non-magnetic material,
• the controller operates the first inverter circuit, the second inverter circuit, and the third inverter circuit,
• controls such that each of a frequency of the second high-frequency current and a frequency of the third high-frequency current is higher than a frequency of the first high-frequency current, and
• controls such that electric power to be supplied to the third coil is smaller than electric power to be supplied to each of the first coil and the second coil.