The voltage applying device includes a voltage applying circuit. The voltage application circuit applies a voltage to a load including a discharge electrode, thereby generating discharge at the discharge electrode, and the discharge electrode can hold the liquid. In the voltage application circuit, during driving, the magnitude of the voltage applied to the load is periodically changed at a driving frequency within a predetermined range to thereby mechanically vibrate the liquid. The predetermined range includes the resonance frequency of the liquid.電壓施加裝置具備有電壓施加電路。電壓施加電路是將電壓施加於包含放電電極的負載，藉此在放電電極產生放電，前述放電電極可保持液體。電壓施加電路是在驅動期間中，使施加於負載之電壓的大小，以預定範圍內的驅動頻率來週期性地變動，藉此使液體機械地振動，前述預定範圍包含液體的共振頻率。
