A power supply circuit comprising: a first input terminal; a second input terminal; a first reactor; a second reactor; a first switching element; a second switching element; a third switching element; a fourth switching element; a first capacitor; a first output terminal; a second output terminal; a control circuit; a first inductor; a second inductor; and a bypass capacitor, wherein the first input terminal is connected to a first end of the first reactor, a second end of the first reactor is connected to a first end of the third switching element, and a second end of the third switching element is connected to the first output terminal, the first input terminal is connected to a first end of the second reactor, a second end of the second reactor is connected to a first end of the fourth switching element, and a second end of the fourth switching element is connected to the first output terminal, the second input terminal is connected to the second output terminal, a first end of the first switching element is connected to the second end of the first reactor, and a second end of the first switching element is connected to the second output terminal, a first end of the second switching element is connected to the second end of the second reactor, and a second end of the second switching element is connected to the second output terminal, a first end of the first capacitor is connected to the first output terminal, and a second end of the first capacitor is connected to the second output terminal, a first end of the first inductor is connected to the first input terminal, a second end of the first inductor is connected to a first end of the second inductor, a second end of the second inductor is connected to a first end of the bypass capacitor, and a second end of the bypass capacitor is connected to the second output terminal, the first reactor and the first inductor are magnetically coupled to each other, and the second reactor and the second inductor are magnetically coupled to each other, and the control circuit is configured to perform switching control over the first switching element and the second switching element, using an interleaving method. a first input terminal; a second input terminal; a first reactor; a second reactor; a first switching element; a second switching element; a third switching element; a fourth switching element; a first capacitor; a first output terminal; a second output terminal; a control circuit; a first inductor; a second inductor; and a bypass capacitor, wherein the first input terminal is connected to a first end of the first reactor, a second end of the first reactor is connected to a first end of the third switching element, and a second end of the third switching element is connected to the first output terminal, the first input terminal is connected to a first end of the second reactor, a second end of the second reactor is connected to a first end of the fourth switching element, and a second end of the fourth switching element is connected to the first output terminal, the second input terminal is connected to the second output terminal, a first end of the first switching element is connected to the second end of the first reactor, and a second end of the first switching element is connected to the second output terminal, a first end of the second switching element is connected to the second end of the second reactor, and a second end of the second switching element is connected to the second output terminal, a first end of the first capacitor is connected to the first output terminal, and a second end of the first capacitor is connected to the second output terminal, a first end of the first inductor is connected to the first input terminal, a second end of the first inductor is connected to a first end of the second inductor, a second end of the second inductor is connected to a first end of the bypass capacitor, and a second end of the bypass capacitor is connected to the second output terminal, the first reactor and the first inductor are magnetically coupled to each other, and the second reactor and the second inductor are magnetically coupled to each other, and the control circuit is configured to perform switching control over the first switching element and the second switching element, using an interleaving method.