PROBLEM TO BE SOLVED: To provide a plasma sterilizer which generates plasma according to types and properties of a granular or powdery object to be sterilized, allows sterilization to be performed stably and reliably while inhibiting harmful effects, allows sterilization to be performed even by a batch process, and can be downsized.SOLUTION: A plasma sterilizer includes: an electric source part 12 for supplying an alternating current having a potential difference from a ground part 13 a pair of electrodes including one electrode 10 and the other electrode 11 for generating plasma through electric discharge generated by the alternating current being supplied and a sterilizing container 14 for storing at least one of the pair of electrodes as well as an object to be sterilized, and includes: a placing part 1 that is composed of a conductive material for placing an object to be sterilized 100, is stored in the sterilizing container 14, and is disposed facing the other electrode 11 in a position at which the one electrode 10 is interposed between the placing part 1 and the other electrode 11 an electric source switching part 2 included in the electric source part 12 for switching between the one electrode 10 and the placing part 1 and a ground switching part 3 included in the ground part 13 for switching between the one electrode 10, the other electrode 11, and the placing part 1.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】粒状や粉末状の殺菌対象物の種類や特性に応じてプラズマ生成を行い、悪影響を抑制して安定的かつ確実に殺菌を行うことができ、バッチ処理でも殺菌が行える小型化できるプラズマ殺菌装置の提供。【解決手段】接地部13に対して電位差を有する交流電流を供給する電源部12と、交流電流が供給されて放電を生じさせ、放電によりプラズマを生成する一の電極10及び他の電極11の一対の電極と、一対の電極の少なくとも一方を収納すると共に、殺菌対象物を収納する殺菌容器14とを備え、殺菌容器14に収納され、他の電極11との間に一の電極10が介在した位置で他の電極11に対向して配設され、殺菌対象物100を載置する導電材から成る載置部1と、電源部12に一の電極10と載置部1とを切替える電源切替部2と、接地部13に一の電極10と他の電極11と載置部1とを切替える接地切替部3とを備えるプラズマ殺菌装置。【選択図】図1
