PROBLEM TO BE SOLVED: To provide a mildew-proofing liquid agent capable of excellently performing a mildew-proofing effect in a bath room or the like.SOLUTION: A mildew-proofing agent formed by dissolving a spreader made of a mildew-proofing agent and modified silicone in water and a manufacturing method of a mildew-proofing agent including a step of mixing and stirring the mildew-proofing agent in water, a step of mixing and stirring an emulsifying agent in an aqueous solution in which the mildew-proofing agent is mixed and stirred and a step of mixing and stirring the spreader made of the modified silicone in an aqueous solution in which the mildew-proofing agent and the emulsifying agent are mixed and stirred.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】浴室等において防カビ効果が良好に果たされる防カビ用液剤を提供する。【解決手段】水に防カビ剤と変性シリコーンよりなる展着剤とが溶解されてなる防カビ剤、水に防カビ剤を混合撹拌する工程と、前記防カビ剤が撹拌混合された水溶液に乳化剤を混合撹拌する工程と、前記防カビ剤と乳化剤とが混合撹拌された水溶液に変性シリコーンよりなる展着剤を混合撹拌する工程と、から構成される防カビ用液剤の製法。【選択図】図1