<;P>;PROBLEM TO BE SOLVED: To provide an oxidation catalyst for sterilization-disinfection which has excellent oxidation acceleration effect, and exhibits high sterilization and disinfection effect in minute amounts, and further provide an oxidation catalyst particle for sterilization-disinfection which contains the catalyst. <;P>;SOLUTION: The oxidation catalyst for sterilization-disinfection contains (a) a polycarboxylic acid-based polymer compound and (b) a copper compound. The oxidation catalyst particle for sterilization/disinfection contains the oxidation catalyst for sterilization-disinfection and (c) a binder compound. <;P>;COPYRIGHT: (C)2009,JPO&INPIT