Power conditioner

A more small-sized and light-weight power conditioner is provided. The power conditioner converts a DC current from a DC power source into an AC current and outputs the AC current from an output terminal. The power conditioner includes: a reactor; a capacitor; a first switching circuit that alternately switches, at a first frequency, between a first state where the DC current supplied from the DC power source is supplied to the reactor and supply of the DC current to the capacitor is shut off and a second state where an electric current is supplied to the capacitor from the reactor in which energy is accumulated by the supply of the DC current and the electric current from the DC power source to the reactor is shut off; and a second switching circuit that alternately switches, at a second frequency, between a first direction in which an electric current supplied from the capacitor flows toward a second output terminal through a first output terminal and a second direction in which the electric current flows t