PURPOSE: To prove a drying efficiency and to improve a dehumidifying performance by providing an air blowing wind tunnel and a heat exchanger connected thereto on the air exhaust side of an air blowing fan, and also, providing a first temperature sensor and a second temperature sensor on the drain side of a cooling pipe of the heat exchanger, and the air blowing wind tunnel on the air exhaust side of the air blowing fan, respectively, detecting a variation of a temperature difference of these first and second temperature sensor parts, and executing the control of a drying motion.

CONSTITUTION: Dehumidified air (b) is heated by a heater 14 and fed into a drum 1, and heated dry air (c) fed dries clothings 17. The air which dries the clothings 17 passes through a filter 5 and is fed into the wind tunnel 12 side again by an air blowing fan 7. By repeating it, a drying cycle advances, and condensed water generated in a heat exchanger 11 is drained from a drain port 18, and clothings can be dried without exhausting humid air to the outside of a drying machine. Also, when drying approaches the end, a temperature difference Δt of a first temperature sensor 21 and a second temperature sensor 22 part becomes large, but when Δt becomes a prescribed value, a delicate drying control such as the drying operation is finished, etc., can be executed. In such a way, hot air of high humidity is not exhausted to the outside of the machine, and an anxiety of deteriorating the indoor dwelling environment can be eliminated.