PROBLEM TO BE SOLVED: To provide a method for generating humidified air which is free from an unpleasant odor derived from bacteria, even when an ultrasonic humidifier whose operation has been stopped for a long time is re-operated.SOLUTION: A tablet comprising the following compounds (A), (B), and (C) is added in a vaporization tank, or a device which supplies water from a water supply tank to the vaporization tank: (A) calcium hypochlorite; (B) calcium carbonate, and (C) calcium stearate.【課題】超音波加湿器において長期間運転を停止した場合にも、再稼働時に細菌由来の不快臭のない加湿空気を生成する方法の提供。【解決手段】下記の化合物(A)、(B)および(C)を含有する錠剤を気化槽又は給水槽から気化槽に供給する機構に添加する。(A)次亜塩素酸カルシウム(B)炭酸カルシウム(C)ステアリン酸カルシウム【選択図】なし