PROBLEM TO BE SOLVED: To provide a sterilizing solution of which decrease in sterilization performance of m-chloroperbenzoic acid (MCPBA) is suppressed by devising a solvent for dissolving MCPBA.SOLUTION: The sterilizing solution for sterilizing objects is composed by comprising MCPBA solution which is a solution in which MCPBA is dissolved into carboxylic acid. By dissolving MCPBA into carboxylic acid, the decrease in oxidation power of MCPBA can be suppressed. Further, by dissolving MCPBA solution and ozone into water, the synergistic effect between MCPBA and ozone enhances the sterilization performance of sterilizing solution as compared with the case where MCPBA alone is present in water and the case where ozone alone is present in water.COPYRIGHT: (C)2015,JPO&INPIT【課題】m-クロロ過安息香酸(MCPBA)を溶解させる溶媒を工夫することで、MCPBAの殺菌性能の低下を抑制した殺菌溶液を提供する。【解決手段】対象物を殺菌する殺菌溶液は、MCPBAをカルボン酸に溶解させた溶液であるMCPBA溶液を含んで構成される。MCPBAをカルボン酸に溶解させることで、MCPBAの酸化力の低下を抑制することができる。さらに、水に、MCPBA溶液およびオゾンを溶解させることで、MCPBAとオゾンとの相乗効果により、MCPBAのみを水中に存在させる場合や、オゾンのみを水中に存在させる場合と比較して、殺菌溶液の殺菌性能を向上することができる。【選択図】図3