Provided is a sterilizer that achieves both excellent safety and operability. A sterilization apparatus (1) according to an embodiment of the present invention is a sterilization apparatus (1) that irradiates an affected area (6) with light including ultraviolet rays, and has a peak wavelength in a wavelength range of 190 nm to 230 nm. One wavelength light (Lλ1) and second wavelength light (Lλ2) having a peak wavelength in a wavelength range of 400 nm to 780 nm are emitted.優れた安全性および操作性を両立させた殺菌装置を提供する。本発明の実施の一態様に係る殺菌装置（１）は、紫外線を含む光を患部（６）に照射する殺菌装置（１）であって、１９０ｎｍ以上２３０ｎｍ以下の波長範囲にピーク波長を有する第一波長光（Ｌλ１）と、４００ｎｍ以上７８０ｎｍ以下の波長範囲にピーク波長を有する第二波長光（Ｌλ２）とを出射する。
