An air cleaning humidifier having a disc assembly performing a purifying function and a humidifying function of indoor air, and a disc assembly thereof. The air cleaning humidifier includes a main body, a tub provided in the main body, an air blower fan to generate an air current in the tub, and a disc assembly rotated under the condition that a part of the disc assembly is disposed in the tub. The disc assembly includes a disc member provided with assembly parts formed by cutting parts of the disc member, at least one plate member disposed at one side of the disc member, and at least one fixing member formed on at least one plate member to fix the assembly parts, and each of the at least one fixing member includes a protrusion part respectively inserted into the assembly parts, and a water storage part.