A humidification and air cleaning apparatus comprising: an air clean module configured to receive external air and to filter the received external air; and an air wash module , separably placed on the air clean module to be supplied with filtered air from the air clean module , for humidifying filtered air characterized in that the air wash module comprises: a humidification connection flow passage to which the filtered air is provided; a humidification flow passage connected to the humidification connection flow passage for humidifying the filtered air therein; a discharge flow passage connected to the humidification flow passage for discharging the humidified air to the outside; a water tank configured to store water; an air wash inlet communicating with a humidification connection flow passage and guiding the filtered air to the humidification flow passage ; a watering unit for spraying water stored in the water tank ; and a water tank humidification medium disposed at the air wash inlet and configured to be spaced from water stored in the water tank , and wetted by water sprayed from the watering unit , wherein when the water tank humidification medium is wetted, the water tank humidification medium is configured to provide moisture to the filtered air flowing through the humidification flow passage . an air clean module configured to receive external air and to filter the received external air; and an air wash module , separably placed on the air clean module to be supplied with filtered air from the air clean module , for humidifying filtered air characterized in that the air wash module comprises: a humidification connection flow passage to which the filtered air is provided; a humidification flow passage connected to the humidification connection flow passage for humidifying the filtered air therein; a discharge flow passage connected to the humidification flow passage for discharging the humidified air to the outside; a water tank configured to store water; an air wash inlet communicating with a humidification connection flow passage and guiding the filtered air to the humidification flow passage ; a watering unit for spraying water stored in the water tank ; and a water tank humidification medium disposed at the air wash inlet and configured to be spaced from water stored in the water tank , and wetted by water sprayed from the watering unit , wherein when the water tank humidification medium is wetted, the water tank humidification medium is configured to provide moisture to the filtered air flowing through the humidification flow passage . a humidification connection flow passage to which the filtered air is provided; a humidification flow passage connected to the humidification connection flow passage for humidifying the filtered air therein; a discharge flow passage connected to the humidification flow passage for discharging the humidified air to the outside; a water tank configured to store water; an air wash inlet communicating with a humidification connection flow passage and guiding the filtered air to the humidification flow passage ; a watering unit for spraying water stored in the water tank ; and a water tank humidification medium disposed at the air wash inlet and configured to be spaced from water stored in the water tank , and wetted by water sprayed from the watering unit , wherein when the water tank humidification medium is wetted, the water tank humidification medium is configured to provide moisture to the filtered air flowing through the humidification flow passage . <EOS>