PROBLEM TO BE SOLVED: To solve the problem in which a drastic therapeutic means usable at room temperature as a daily practice is desired for a patient of atopic dermatitis disease.SOLUTION: The present invention provides a Staphylococcus aureus inhibiting solution that is for use at room temperature and inhibits Staphylococcus aureus. The solution contains natural alum in the concentration of 0.5 g/dl or more and has PH of 3.71 or less.SELECTED DRAWING: None【課題】アトピー性皮膚炎疾患の患者にとって、室温で日常習慣的に使用可能で根本的に治癒する手段が求められていた。【解決手段】天然明礬0.5g/dl濃度以上で、PHが3.71以下で黄色ブドウ球菌を抑制する室温使用用の黄色ブドウ球菌抑制溶液。【選択図】なし