To provide a plasma sterilization apparatus that when performing plasma sterilization, effectively performs plasma treatment while rolling and rotating a large amount of a granular object to be treated and achieves cost reduction.SOLUTION: In an atmospheric pressure plasma sterilization apparatus, barrier discharge plasma generating means 30a, 30b, 30c consisting of a ground electrode 12a, a non-ground electrode 11a, and dielectrics 10a, 10b are arranged inside a reaction vessel 1aa having a charge port 23 and a discharge port 15 for an object 19 to be treated by plasma, an air flow that conveys the object 19 is supplied from a blower 24a, and barrier discharge plasma treatment of the object 19 is performed while rolling and moving the object 19 by the electrode 11a and air flow deflector plates 9aa and 9bb arranged at an attack angle upward with respect to the air flow.SELECTED DRAWING: Figure 4【課題】プラズマ殺菌処理に際し、大量の粒状の処理対象物を転動回転させながら、効果的にプラズマ処理し、かつ、低コスト化を実現する、プラズマ殺菌処理装置の提供。【解決手段】プラズマ処理対象物１９の投入口２３と取り出し口１５を備えた反応容器１ａａの内部に、接地電極１２ａと非接地電極１１ａと誘電体１０ａ、１０ｂから成るバリア放電プラズマ発生手段３０ａ、３０ｂ、３０ｃを配置し、対象物１９を搬送する気流を送風機２４ａから供給し、気流に対して上向きの迎え角で配置された電極１１ａ及び気流偏向板９ａａ，９ｂｂにより転動移動させながら対象物１９のバリア放電プラズマ処理を行う、大気圧プラズマ殺菌処理装置。【選択図】図４
