PURPOSE: A humidifying device is provided to prevent the generation of scales and the propagation of microorganism caused when a humidifying filter member is dipped in water for a long time. CONSTITUTION: A humidifying device(100) comprises a device housing(110) and a humidifying part(130). The device housing has a water tank(131) and a blowing fan(113). The humidifying part comprises a humidifying filter unit and a humidification driving member. The humidifying filter unit is positioned on an air passage to humidify air. The humidification driving member is interlocked with the exterior of the humidifying filter unit to rotate the humidifying filter unit.
