A laundry treatment apparatus comprising: a treatment chamber for containing clothes therein; a circulation flow channel for guiding flowing air so as to circulate the flowing air through the treatment chamber; a blower disposed in the circulation flow channel so as to forcibly blow the air; a heater for heating the air before the flowing air is supplied into the treatment chamber; and a thermoelectric heat pump device for exchanging heat with the flowing air before the flowing air is heated by the heater, wherein the circulation flow channel includes a first branch flow channel and a second branch flow channel, which are connected to each other in parallel so as to divide the flowing air into a first flowing air branch and a second flowing air branch, and which guide the first flowing air branch and the second flowing air branch, respectively, wherein the laundry treatment apparatus further comprises a condenser disposed in the first branch flow channel so as to condense moisture contained in the first flowing air branch, wherein the circulation flow channel diverges into the first branch flow channel and the second branch flow channel from a portion which is positioned upstream of the condenser, wherein the thermoelectric heat pump device comprises: a heat radiation part disposed in the first branch flow channel so as to heat the first flowing air branch, which has passed through the condenser; a heat absorption part disposed in the second branch flow channel so as to cool the second flowing air branch; and a thermoelectric pump unit for transferring heat from the heat absorption part to the heat radiation part, wherein the circulation flow channel further includes a converging flow channel in which the first branch flow channel and the second branch flow channel are joined with each other such that the first flowing air branch, which has passed through the heat radiation part, and the second flowing air branch, which has passed through the heat absorption part, meet each other in the converging flow channel and the mixed flowing air is guided toward the heater, wherein the thermoelectric pump unit comprises: a Peltier element; and a heat radiation surface and a heat absorption surface, which are disposed on respective sides of the Peltier element, wherein the heat radiation part is configured to receive heat from the heat radiation surface, and the heat absorption part is configured to transfer heat to the heat absorption surface. a treatment chamber for containing clothes therein; a circulation flow channel for guiding flowing air so as to circulate the flowing air through the treatment chamber; a blower disposed in the circulation flow channel so as to forcibly blow the air; a heater for heating the air before the flowing air is supplied into the treatment chamber; and a thermoelectric heat pump device for exchanging heat with the flowing air before the flowing air is heated by the heater, wherein the circulation flow channel includes a first branch flow channel and a second branch flow channel, which are connected to each other in parallel so as to divide the flowing air into a first flowing air branch and a second flowing air branch, and which guide the first flowing air branch and the second flowing air branch, respectively, wherein the laundry treatment apparatus further comprises a condenser disposed in the first branch flow channel so as to condense moisture contained in the first flowing air branch, wherein the circulation flow channel diverges into the first branch flow channel and the second branch flow channel from a portion which is positioned upstream of the condenser, wherein the thermoelectric heat pump device comprises: a heat radiation part disposed in the first branch flow channel so as to heat the first flowing air branch, which has passed through the condenser; a heat absorption part disposed in the second branch flow channel so as to cool the second flowing air branch; and a thermoelectric pump unit for transferring heat from the heat absorption part to the heat radiation part, a heat radiation part disposed in the first branch flow channel so as to heat the first flowing air branch, which has passed through the condenser; a heat absorption part disposed in the second branch flow channel so as to cool the second flowing air branch; and a thermoelectric pump unit for transferring heat from the heat absorption part to the heat radiation part, wherein the circulation flow channel further includes a converging flow channel in which the first branch flow channel and the second branch flow channel are joined with each other such that the first flowing air branch, which has passed through the heat radiation part, and the second flowing air branch, which has passed through the heat absorption part, meet each other in the converging flow channel and the mixed flowing air is guided toward the heater, wherein the thermoelectric pump unit comprises: a Peltier element; and a heat radiation surface and a heat absorption surface, which are disposed on respective sides of the Peltier element, a Peltier element; and a heat radiation surface and a heat absorption surface, which are disposed on respective sides of the Peltier element, wherein the heat radiation part is configured to receive heat from the heat radiation surface, and the heat absorption part is configured to transfer heat to the heat absorption surface.