PROBLEM TO BE SOLVED: To provide an ozone oxidation accelerator capable of remarkably accelerating oxidation effect by ozone, particularly sterilization effect by ozone, while reducing the amount of the ozone oxidation accelerator to be used, in an ozone oxidation treatment in a low concentration, an ozone oxidation accelerator composition and an ozone treatment method.SOLUTION: The ozone oxidation accelerator is prepared by mixing an (a) component, a (b) component described below and water: (a) a compound 0.5 mass% aqueous solution of which exhibits &le70 mN/m dynamic surface tension at 25°C and at the time of 100 msec and 55-67 mN/m dynamic surface tension at the time of 30 sec and (b) a water soluble acidic component.COPYRIGHT: (C)2008,JPO&INPIT【課題】低濃度でのオゾン酸化処理において、オゾン酸化促進剤の使用量を低減させながら、オゾンの酸化効果、特にオゾンによる殺菌効果を著しく促進できるオゾン酸化促進剤、オゾン酸化促進剤組成物およびオゾン処理方法を提供する。【解決手段】下記(a)成分と(b)成分と水とを混合してなることを特徴とするオゾン酸化促進剤。(a)25℃における0.5質量%水溶液の100ミリ秒(msec)時の動的表面張力が70mN/m以下で、かつ30秒(sec)時の動的表面張力が55~67mN/mの範囲である化合物。(b)水溶性の酸性成分。【選択図】なし