The present disclosure relates to a dishwasher. A dishwasher according to the present invention includes a tub forming a washing chamber for washing a washing target; a first circulation duct through which air discharged from the tub flow; an outside air inflow duct in which air introduced from an outside flow; a fan assembly sucking air thereinto from the first circulation duct and the outside air inflow duct and discharging the sucked air; a second circulation duct heating and supplying a portion of air discharged from the fan assembly to the tub; an exhaust duct discharging a remaining portion of air discharged from the fan assembly to the outside.