Abstract: The air conditioner includes: a cabin air conditioner, a seat air conditioner, and a controller that controls the cabin air conditioner and the seat air conditioner. The cabin air conditioner includes an indoor air blower that blows air into the cabin, a cooler that cools air blown by the indoor air blower, and a thermal storage unit that stores cold heat generated by the cooler. The seat air conditioner includes a ventilation opening formed on a seat in the cabin, and a seat air blower that draws air inside the cabin through the ventilation opening. The controller controls the cabin air conditioner to cool the air by the cold heat stored in the thermal storage unit, and lowers an air conditioning performance of the cabin air conditioner when the seat air conditioner is operated.