The present invention relates to a clothing treatment apparatus comprising: a heat pump having an evaporator, a compressor, a condenser, and an expansion valve, and applying heat to air circulating in a drum; an air flow path forming a movement path such that the air is circulated through the drum; a lint filter provided on the air flow path and collecting lint contained in the air; and a condensate water collecting part collecting condensate water generated in the evaporator and supplying the condensate water to the lint filter, wherein the condensate water supplied from the condensate water collecting part is supplied to the upper portion of the lint filter, and the lint collected in the lint filter is moved to the lower portion of the lint filter, thereby securing the air flow path of the lint filter.