PROBLEM TO BE SOLVED: To provide an efficient driving method capable of generating continuous mist with low power consumption even with an ultrasonic atomizer having a simple structure. An ultrasonic atomizer 100 has an ultrasonic vibrating unit 20 that generates ultrasonic waves, and atomizes a liquid that comes into direct contact with the ultrasonic vibrating unit. The driving method of the ultrasonic atomizer 100 is an ON period in which the ultrasonic vibrating unit 20 is driven by a power capable of generating atomization, and an ON period in which the ultrasonic vibrating unit 20 is driven by a power not capable of generating atomization. The next ON period is started before the atomized state generated in the ON period disappears in the OFF period. [Selection diagram] Fig. 1【課題】簡単な構造の超音波霧化器であっても、低消費電力で連続した霧を発生できる効率の良い駆動方法を提供する。【解決手段】超音波霧化器１００は、超音波を発生する超音波振動部２０を有し、超音波振動部に直接接触する液体を霧化する。超音波霧化器１００の駆動方法は、霧化を発生させることのできる電力で超音波振動部２０を駆動するＯＮ期間と、霧化を発生することのできない電力で超音波振動部２０を駆動するＯＦＦ期間と、を有し、ＯＮ期間で発生した霧化状態が、ＯＦＦ期間において消滅する前に、次のＯＮ期間が開始される。【選択図】図１
