An object of the present invention is to provide a method for controlling spider mites that can obtain a high control effect without using an acaricide. A method for controlling spider mites, wherein nano-bubble water is applied to a plant body.本發明的課題在於提供一種即便不使用殺蟎劑亦可獲得高防治效果的蜘蛛蟎類的防治方法。一種蜘蛛蟎類的防治方法,其中將奈米氣泡水施用於植物體。