Patent ID: 8500106

Claim:
A humidifier comprising: a filter unit including a filter main body having a water absorbability and air permeability; a rotation drive mechanism for rotating the filter unit in a circumferential direction; a water tank for reserving water; and a fan for causing air to pass through the filter unit in a direction crossing the filter unit, wherein the filter unit is disposed in a vertical orientation, the filter main body having at least one first peripheral portion where during rotation the first peripheral portion is immersible in the water reserved in the water tank, and the filter main body further having at least one second peripheral portion that during rotation is not immersible in the water reserved in the water tank, wherein the first peripheral portion and the second peripheral portion are respectively provided in a part and a remaining part of an outer peripheral portion of the filter main body, and the first peripheral portion has an outer edge in an arc shape having a central angle exceeding two right angles.