A rectifier according to an aspect of the present disclosure includes: a bridge circuit that derives a positive voltage component and a negative voltage component from an AC power supply voltage; a smoothing capacitor that smooths an output voltage from the bridge circuit; a pre-charge resistor that is provided between the bridge circuit and the smoothing capacitor, and reduces an inrush current; a charge switch that is provided in parallel with the pre-charge resistor; and a controller that controls the charge switch between an open state and a close state, wherein when application of the AC power supply voltage to the bridge circuit is started, the controller closes the charge switch if a voltage applied between ends of the pre-charge resistor is determined to become equal to or lower than a predetermined resistor threshold voltage.