PROBLEM TO BE SOLVED: To provide a sterilizing apparatus excellent in sterilizing effect and a sterilization method using the apparatus.SOLUTION: A sterilizing apparatus comprises an active oxygen irradiation unit 4 that generates plasma using an alternating current and irradiates an object with active oxygen generated using the obtained plasma, and an irradiation table 8 on which an object to be sterilized is mounted, wherein the irradiation table 8 has an active oxygen barrier structure 9 disposed at least one of above, below, or horizontally with respect to the object to be sterilized. A sterilization method generates plasma using an alternating current and irradiates an object with active oxygen generated using the obtained plasma to perform sterilization, wherein the sterilization is performed by arranging an active oxygen barrier structure 9 at least one of above, below, or horizontally with respect to the object to be sterilized.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】殺菌効果に優れる殺菌装置及び該装置を用いた殺菌方法の提供。【解決手段】交流電流を用いてプラズマを発生させ、得られたプラズマを用いて発生させた活性酸素を照射する活性酸素照射ユニット4及び殺菌対象物を載置する照射台8を含んでなる殺菌装置であって、照射台8が殺菌対象物の上方、下方、又は水平方向の少なくとも一方向に活性酸素遮蔽構造9を有する、殺菌装置。並びに、交流電流を用いてプラズマを発生させ、得られたプラズマを用いて発生させた活性酸素を照射して殺菌する方法であって、殺菌対象物の上方、下方、又は水平方向の少なくとも一方向に活性酸素遮蔽構造9を配置して行う、殺菌方法。【選択図】図2