A laundry treatment apparatus comprising: a laundry receiving unit (2, 3) configured to provide a space for receiving laundry and having an inlet port and an outlet port; a duct connected to the outlet port and the inlet port so as to supply air to the laundry receiving unit (2, 3) through the inlet port and to discharge air in the laundry receiving unit (2, 3) through the outlet port; a fan located inside the duct to circulate interior air of the laundry receiving unit (2, 3); a first heat exchanger located inside the duct configured to exchange heat with air introduced into the duct; a second heat exchanger located in the duct and spaced apart from the first heat exchanger in the longitudinal direction of the duct to exchange heat with air having passed through the first heat exchanger; and a heat transfer unit including a first conductor coming into contact with the first heat exchanger and connected to a positive electrode of a direct current power source, a second conductor coming into contact with the first heat exchanger and connected to a negative electrode of the DC power source, the second conductor being separated from the first conductor, a third conductor coming into contact with the second heat exchanger, a P-type semiconductor configured to interconnect the first conductor and the third conductor, and an N-type semiconductor configured to interconnect the second conductor and the third conductor, characterized in that the first heat exchanger and the second heat exchanger are sequentially arranged in straight line in the longitudinal direction of the duct from the fan to the inlet port. a laundry receiving unit (2, 3) configured to provide a space for receiving laundry and having an inlet port and an outlet port; a duct connected to the outlet port and the inlet port so as to supply air to the laundry receiving unit (2, 3) through the inlet port and to discharge air in the laundry receiving unit (2, 3) through the outlet port; a fan located inside the duct to circulate interior air of the laundry receiving unit (2, 3); a first heat exchanger located inside the duct configured to exchange heat with air introduced into the duct; a second heat exchanger located in the duct and spaced apart from the first heat exchanger in the longitudinal direction of the duct to exchange heat with air having passed through the first heat exchanger; and a heat transfer unit including a first conductor coming into contact with the first heat exchanger and connected to a positive electrode of a direct current power source, a second conductor coming into contact with the first heat exchanger and connected to a negative electrode of the DC power source, the second conductor being separated from the first conductor, a third conductor coming into contact with the second heat exchanger, a P-type semiconductor configured to interconnect the first conductor and the third conductor, and an N-type semiconductor configured to interconnect the second conductor and the third conductor, characterized in that the first heat exchanger and the second heat exchanger are sequentially arranged in straight line in the longitudinal direction of the duct from the fan to the inlet port.