A humidification and air cleaning apparatus comprising: a water tank to store water; a watering housing disposed inside the water tank to spray the water of the water tank ; a watering motor to generate a torque; and a power transmission shaft disposed inside the watering housing to deliver a torque of the watering motor to the watering housing , wherein the watering housing comprises: a first watering housing spaced apart from an undersurface of an inner side of the water tank by a suction gap and having upper and a lower sides thereof opened, respectively; a second watering housing having upper and lower sides opened, assembled with an upper end of the first watering housing ; a watering housing cover coupled with an upper end of the second watering housing to cover an upper surface of the second watering housing ; and a power transmission unit disposed in at least one of the first watering housing , the second watering housing and the watering housing cover to receive a torque from the watering motor , wherein the power transmission shaft is coupled to the power transmission unit , wherein the power transmission shaft has an upper end thereof coupled to the watering housing cover , wherein the watering housing cover has a diameter larger than a diameter of the second watering housing and seals the upper side of the second watering housing . a water tank to store water; a watering housing disposed inside the water tank to spray the water of the water tank ; a watering motor to generate a torque; and a power transmission shaft disposed inside the watering housing to deliver a torque of the watering motor to the watering housing , wherein the watering housing comprises: a first watering housing spaced apart from an undersurface of an inner side of the water tank by a suction gap and having upper and a lower sides thereof opened, respectively; a second watering housing having upper and lower sides opened, assembled with an upper end of the first watering housing ; a watering housing cover coupled with an upper end of the second watering housing to cover an upper surface of the second watering housing ; and a power transmission unit disposed in at least one of the first watering housing , the second watering housing and the watering housing cover to receive a torque from the watering motor , wherein the power transmission shaft is coupled to the power transmission unit , wherein the power transmission shaft has an upper end thereof coupled to the watering housing cover , wherein the watering housing cover has a diameter larger than a diameter of the second watering housing and seals the upper side of the second watering housing . a first watering housing spaced apart from an undersurface of an inner side of the water tank by a suction gap and having upper and a lower sides thereof opened, respectively; a second watering housing having upper and lower sides opened, assembled with an upper end of the first watering housing ; a watering housing cover coupled with an upper end of the second watering housing to cover an upper surface of the second watering housing ; and a power transmission unit disposed in at least one of the first watering housing , the second watering housing and the watering housing cover to receive a torque from the watering motor , wherein the power transmission shaft is coupled to the power transmission unit , wherein the power transmission shaft has an upper end thereof coupled to the watering housing cover , wherein the watering housing cover has a diameter larger than a diameter of the second watering housing and seals the upper side of the second watering housing . <EOS>