An air conditioner includes a main body unit and an auxiliary housing. The main body unit forms a first air outlet which blows out a cool or warm airflow. The auxiliary housing is attached to at least one side of the first air outlet to be freely movable, and forms a second air outlet which blows out taken-in indoor air. A control circuit controls a second wind direction plate so that a second reference plane PL2 which regulates a wind direction of the second wind direction plate intersects a first reference plane PL1 which regulates a wind direction of a first wind direction plate, on a downstream side of the airflow.