Abstract: A degaussing circuit comprising a rectifying circuit for rectifying an AC voltage inputted therein into a DC voltage, a capacitor for smoothing the DC voltage from the rectifying circuit, a RC charging circuit for charging with the DC voltage smoothed by the capacitor, a positive temperature coefficient resistor having a resistance which is increased with an increase in a temperature due to an AC current flowing therethrough upon power supply, a degaussing coil for removing a magnetic field in response to the AC current flowing through the positive temperature coefficient resistor thereto, a relay for controlling the flow of the AC current through the positive temperature coefficient resistor to the degaussing coil, and a relay driving circuit for controlling an ON/OFF state of the relay in response to the voltage charged on the RC charging circuit.