The present invention provides a new technology that uses ultraviolet rays to reduce the risk of infection caused by humidifiers.The humidifier of the present invention includes: a water tank that contains water； an atomizer that atomizes the water contained in the water tank； a path 18 for directing the atomized water to the outside； and an opening 20 formed on one side of the path The end 18a sprays atomized water； and the ultraviolet ray irradiation part 22 irradiates the atomized water with ultraviolet L. The ultraviolet irradiation unit 22 is configured to irradiate the ultraviolet L from the direction opposite to the direction X of the atomized water toward the opening 20.本發明係提供一種利用紫外線來減少因加濕器所造成的感染症等的風險的新技術。本發明的加濕器包括：容納水的水箱；將容納於水箱的水霧化的霧化器；使霧化了的水朝向外部的路徑18；開口部20，係形成於路徑之一側的端部18a並噴射霧化了的水；以及紫外線照射部22，係對霧化了的水照射紫外線L。紫外線照射部22係構成為以從與霧化了的水朝向開口部20的方向X相反的方向的方式照射紫外線L。
