A switching power supply circuit configured to receive AC power from an AC power supply (V AC), the switching power supply circuit comprising: a rectifier arranged to receive the AC power and configured to rectify the AC power to produce DC power having a first DC voltage (V i); a DC voltage section having a first capacitor and a second capacitor connected in series with each other, wherein the first and second capacitors (CB1, CB2) connected in series with each other are arranged to receive the DC power having the first DC voltage (V i) and to smooth the first DC voltage (V i); a first resistor connected to said first capacitor in parallel; a second resistor connected to said second capacitor in parallel; a third resistor connected to a connection point at which said first and second capacitors (CB1, CB2) are connected in series and at which said first and second resistors (RB1, RB2) are connected in series; and a PWM control circuit (CTRL) connected in parallel to said second resistor for performing a PWM control on a primary side of a transformer of said switching power supply circuit; wherein: at said connection point a second DC voltage (V A), divided from said first DC voltage (Vi) smoothed by said first and second capacitors (CB1, CB2), appears; said DC voltage section is connected to a point at which said first DC voltage (Vi) smoothed by said first and second capacitors (CB1, CB2) appears; said PWM control circuit (CTRL) is connected to a terminal at which a DC voltage (V C) is generated and from which necessary power is supplied to said PWM control circuit (CTRL), said terminal being connected to said connection point through said third resistor, and said third resistor is composed of plural resistors connected in series. a rectifier arranged to receive the AC power and configured to rectify the AC power to produce DC power having a first DC voltage (V i); a DC voltage section having a first capacitor and a second capacitor connected in series with each other, wherein the first and second capacitors (CB1, CB2) connected in series with each other are arranged to receive the DC power having the first DC voltage (V i) and to smooth the first DC voltage (V i); a first resistor connected to said first capacitor in parallel; a second resistor connected to said second capacitor in parallel; a third resistor connected to a connection point at which said first and second capacitors (CB1, CB2) are connected in series and at which said first and second resistors (RB1, RB2) are connected in series; and a PWM control circuit (CTRL) connected in parallel to said second resistor for performing a PWM control on a primary side of a transformer of said switching power supply circuit; wherein: at said connection point a second DC voltage (V A), divided from said first DC voltage (Vi) smoothed by said first and second capacitors (CB1, CB2), appears; said DC voltage section is connected to a point at which said first DC voltage (Vi) smoothed by said first and second capacitors (CB1, CB2) appears; said PWM control circuit (CTRL) is connected to a terminal at which a DC voltage (V C) is generated and from which necessary power is supplied to said PWM control circuit (CTRL), said terminal being connected to said connection point through said third resistor, and said third resistor is composed of plural resistors connected in series. at said connection point a second DC voltage (V A), divided from said first DC voltage (Vi) smoothed by said first and second capacitors (CB1, CB2), appears; said DC voltage section is connected to a point at which said first DC voltage (Vi) smoothed by said first and second capacitors (CB1, CB2) appears; said PWM control circuit (CTRL) is connected to a terminal at which a DC voltage (V C) is generated and from which necessary power is supplied to said PWM control circuit (CTRL), said terminal being connected to said connection point through said third resistor, and said third resistor is composed of plural resistors connected in series.