An air conditioner includes a controller that controls an inverter on the basis of an instruction received by a receiver. The controller includes: a rotational speed acquisition unit that acquires a specific rotational speed corresponding to a combination of an air volume and an air speed; a correction value acquisition unit that acquires a specific correction value by determining an operation mode, presence or absence of a power saving mode, and presence or absence of a sleeping mode; and a selection unit that selects three-phase operation when the specific rotational speed is lower than a threshold calculated by adding the specific correction value to a fixed value, or selects two-phase operation when the specific rotational speed is higher than or equal to the threshold.