PROBLEM TO BE SOLVED: To provide a technology capable of generating chlorine dioxide gas and decomposing the chlorine dioxide gas in a short time.SOLUTION: A chlorine dioxide generating system includes a chlorine dioxide gas generating apparatus 2 for generating chlorine dioxide gas in a vessel housing pellet-shaped sodium chlorite and an acidic solution, and a chlorine dioxide gas decomposing apparatus 5 for receiving a residual gas of the chlorine dioxide gas discharged into a room from the chlorine dioxide gas generating apparatus and decomposing it. The chlorine dioxide gas decomposing apparatus is equipped with a shielding body that encloses the vessel to form an inner space of the chlorine dioxide gas generating apparatus and has a chink at the lower part for taking air in the inner space, and a fan 4 for aspirating the air in the inner space and the generated chlorine dioxide gas and sending them to the room.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】二酸化塩素ガスを発生でき、かつ、二酸化塩素ガスを短時間で分解できる技術を提供する。【解決手段】ペレット状亜塩素酸ナトリウムと酸性液とを収容する容器内において二酸化塩素ガスを発生する二酸化塩素ガス発生装置2と、前記二酸化塩素ガス発生装置から室内に出力された二酸化塩素ガスの残留ガスを取込み、分解する二酸化塩素ガス分解装置5とを備え、二酸化塩素ガス分解装置は、容器の周囲を囲み、二酸化塩素ガス発生装置の内部空間を形成し、内部空間内に空気を取り込む隙間が下部に設けられている遮蔽体と、内部空間内の空気および発生した二酸化塩素ガスを吸引して室内に送るファン4と、を備える【選択図】図1