An induction heating cooker comprising: a heating coil; an inverter circuit having a switching device, the inverter circuit performing on-off control of the switching device to supply high frequency current to the heating coil; a radiator (10; 10A) having a mounting surface on which the switching device is mounted; and a printed wiring board (9; 9A) on which components included in the inverter circuit are arranged, wherein the radiator (10; 10A) is mounted on a surface on one side of the printed wiring board (9; 9A), characterized in that the printed wiring board (9; 9A) has an opening larger than a main body of the switching device, the main body being a part of the switching device excluding a lead portion of the switching device, the switching device is mounted on the mounting surface of the radiator (10; 10A) through the opening of the printed wiring board (9; 9A), and the lead portion comprises an extending part which linearly extends from the main body of the switching device in a direction substantially parallel to the mounting surface of the radiator (10; 10A), a projecting part (7a2) which extends and projects in a direction away from the mounting surface of the radiator (10; 10A) beyond a root of the lead portion on the main body of the switching device and beyond another surface on the other side of the printed wiring board (9; 9A) different from the surface on the one side of the printed wiring board (9; 9A), and an inclined-and-extending part (7a3) which is inclined at a predetermined inclination angle relative to the other surface of the printed wiring board (9; 9A) and extends from a projecting end of the projecting part (7a2) to the other surface of the printed wiring board (9; 9A). a heating coil; an inverter circuit having a switching device, the inverter circuit performing on-off control of the switching device to supply high frequency current to the heating coil; a radiator (10; 10A) having a mounting surface on which the switching device is mounted; and a printed wiring board (9; 9A) on which components included in the inverter circuit are arranged, wherein the radiator (10; 10A) is mounted on a surface on one side of the printed wiring board (9; 9A), characterized in that the printed wiring board (9; 9A) has an opening larger than a main body of the switching device, the main body being a part of the switching device excluding a lead portion of the switching device, the switching device is mounted on the mounting surface of the radiator (10; 10A) through the opening of the printed wiring board (9; 9A), and the lead portion comprises an extending part which linearly extends from the main body of the switching device in a direction substantially parallel to the mounting surface of the radiator (10; 10A), a projecting part (7a2) which extends and projects in a direction away from the mounting surface of the radiator (10; 10A) beyond a root of the lead portion on the main body of the switching device and beyond another surface on the other side of the printed wiring board (9; 9A) different from the surface on the one side of the printed wiring board (9; 9A), and an inclined-and-extending part (7a3) which is inclined at a predetermined inclination angle relative to the other surface of the printed wiring board (9; 9A) and extends from a projecting end of the projecting part (7a2) to the other surface of the printed wiring board (9; 9A). an extending part which linearly extends from the main body of the switching device in a direction substantially parallel to the mounting surface of the radiator (10; 10A), a projecting part (7a2) which extends and projects in a direction away from the mounting surface of the radiator (10; 10A) beyond a root of the lead portion on the main body of the switching device and beyond another surface on the other side of the printed wiring board (9; 9A) different from the surface on the one side of the printed wiring board (9; 9A), and an inclined-and-extending part (7a3) which is inclined at a predetermined inclination angle relative to the other surface of the printed wiring board (9; 9A) and extends from a projecting end of the projecting part (7a2) to the other surface of the printed wiring board (9; 9A).