POWER SUPPLY CONTROL CIRCUIT AND COOKER

PROBLEM TO BE SOLVED: To overcome the problem such that a power supply maintaining switch for supplying power to a control means is inserted in power supply lines in series and needs to have a large capacity and allow a current identical to a load current, and a resistor for discharging charge in a noise preventing capacitor is connected to the noise preventing capacitor in parallel and power consumption on standby arises although the power consumption is small. SOLUTION: A series circuit 21 provided with a noise preventing capacitor 2 and the power supply maintaining switch 4 connected in series, in inserted and connected between the power supply lines 1a, 1b. A connection point between the noise preventing capacitor 2 and the power supply maintaining switch 4 is connected to a primary side terminal 7a of a step-down transformer 7 through an auxiliary power supply line 1d. A primary side terminal 7b of the step-down transformer 7 is connected to the power supply line 1b.