PROBLEM TO BE SOLVED: To produce an aqueous antibacterial agent-containing liquid which develops excellent antibacterial properties although it has a low concentration of a phenolic antibacterial agent.SOLUTION: A method for producing the antibacterial agent-containing liquid comprises mixing an alkaline aqueous solution which is obtained by dissolving the phenolic antibacterial agent and has a pH of 9 or more with an acid having a pH of 6 or more.COPYRIGHT: (C)2010,JPO&INPIT【課題】低濃度のフェノール系抗菌剤でも優れた抗菌性を発現する水系の抗菌剤含有液を製造する。【解決手段】抗菌剤含有液の製造方法は、フェノール系抗菌剤を溶解させたpH9以上のアルカリ性水溶液とpH6以下の酸とを混合する。【選択図】なし