In the inorganic compound it is superior in insecticidal operation, furthermore it offers the insecticide which low shows high insecticidal activity at concentration. It designates that it contains two chlorine oxides as the active ingredient as feature, two chlorine oxide concentration in the space when it is maintained in 0.0001ppm - 0.1ppm it supplies two chlorine oxide gases inside the space.無機化合物で殺虫作用に優れ、しかも低濃度で高い殺虫活性を示す殺虫剤を提供する。二酸化塩素を有効成分として含有することを特徴とし、空間における二酸化塩素濃度を0.0001ppm~0.1ppmに維持した状態で二酸化塩素ガスを空間内に供給する。