An air conditioner includes an outdoor unit, a plurality of indoor units, and a controller. The outdoor unit includes a first throttling device. The indoor unit includes a second throttling device. The controller is configured to: regulate an opening degree of the first throttling device, so that a first supercooling temperature is within a first supercooling temperature range in a case where the air conditioner is in a cooling mode; regulate opening degrees of a plurality of second throttling devices in a case where the air conditioner is in a heating mode, so that a plurality of second supercooling temperatures are each within a second supercooling temperature range, and an absolute value of a difference between each of the plurality of second supercooling temperatures and an average value of the plurality of second supercooling temperatures is less than or equal to a first threshold.