PROBLEM TO BE SOLVED: To provide a sterilizer which is effective for sterilization of germ or the like inside an oral cavity while reducing an impact to a human body.SOLUTION: A sterilizer 100 includes: a semiconductor light-emitting element for emitting an ultraviolet light having a peak emission wavelength in a range from 300nm or more to less than 400nm and an irradiation part 24 for irradiating the ultraviolet light emitted from the semiconductor light-emitting element to an object to be irradiated. The semiconductor light-emitting element may emit an ultraviolet light having a peak emission wavelength in a range from 300nm or more to 320nm or less. Also, the semiconductor light-emitting element may be configured to have an illumination intensity of 0.5 to 3 mW/cm2 at a part on which the ultraviolet light is irradiated. Further, a control unit can control an operation of the semiconductor light-emitting element so that the irradiation time of the ultraviolet light falls within a range of 10 to 60 seconds.SELECTED DRAWING: Figure 15COPYRIGHT: (C)2017,JPO&INPIT【課題】人体に与える影響を低減しつつ、口腔内の細菌等の殺菌に有効な殺菌装置を提供する。【解決手段】殺菌装置100は、ピーク発光波長が300nm以上400nm未満の範囲にある紫外線を発する半導体発光素子と、半導体発光素子が発する紫外線を照射対象部に照射する照射部24と、を備える。半導体発光素子は、ピーク発光波長が300nm以上320nm以下の範囲にある紫外線を発してもよい。また、半導体発光素子は、紫外線被照射部における照度が0.5~3mW/cm2となるように構成されていてもよい。また、制御部は、紫外線の照射時間が10~60秒の範囲となるように半導体発光素子の駆動を制御してもよい。【選択図】図15
