An air cleaner according to an embodiment of the present invention includes a water tank for storing water, a rotating shaft that is mounted in the water tank and rotates, and is coupled to the rotating shaft to rotate in the length direction of the rotating shaft. A rotating body that rotates as an axis and is formed with a plurality of rotor blades capable of collecting air, and the rotating shaft forms a predetermined angle with a water surface formed by water stored in the water tank. It is characterized in that it is attached obliquely. [Selection] Figure 1本発明の一実施例による空気清浄機は、水が収容されるための水槽と、水槽内に装着して回転する回転シャフトと、前記回転シャフトに結合して前記回転シャフトの長さ方向を回転軸として回転し、空気捕集が可能な複数の回転翼が形成される回転体とを含み、前記回転シャフトは、前記水槽内に収容される水が形成する水面と所定の角度を形成するように斜めに装着することを特徴とする。【選択図】図1