A power converter (100) is provided with an inverter (4) for supplying a load with power by converting direct current power into alternating current power; a converter (3) for supplying the inverter (4) with power by converting the alternating current power supplied from an alternating current power supply (1) into direct current power; a direct current voltage converter (7), which converts a voltage value of power stored in an accumulator (8) and supplies the inverter (4) with the direct current power from the accumulator (8) when the power supply from the alternating current power supply (1) is abnormal; and a filter (5), which includes a reactor and a capacitor, and removes harmonic generated by the inverter (4). The inverter (4) includes a three-level circuit composed of an arm (4UA) and an AC switch (4UB).