An air washer includes an outer case having an air suction port, a water tub disposed in the outer case to store water, a humidification unit disposed in the water tub, a display unit disposed so as to be spaced apart from the outer case to form an air discharge port, the display unit having a water supply port, through which water is supplied, an inner case located at an upper side of the water tub, the inner case having an air channel, connecting the air suction port with the air discharge port, and a water channel, along which the water injected through the water supply port is guided to the water tub, and a blower disposed in the inner case to blow air suctioned through the air suction port to the air discharge port.