PROBLEM TO BE SOLVED: To provide transparent soap-based skin cleansing compositions having good foam quality, after wash feeling, and usability and being excellent in low temperature stability, though the compound amount of the potash soap is small.SOLUTION: The present invention provides a soap-based skin cleansing composition characterized by containing the following components (A)-(C): (A) 0.3-1.5 mass% of an alkyl sulfobetaine based surfactant (B) 3-5 mass% of a straight-chain fatty acid alkanol amide based surfactant (but excluding straight-chain fatty acid monoethanolamide based surfactant) and (C) 7-15 mass% of fatty acid and a potassium salt thereof in which the mass ratio of fatty acid : potassium salt of fatty acid is 1:99-0:100.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】カリ石けんの配合量が少量でありながらも、泡質、洗い上がりの感触および使用性が良好であり、低温安定性に優れた透明な石けん系皮膚洗浄剤組成物を提供する。【解決手段】下記成分(A)~(C)を含有することを特徴とする石けん系皮膚洗浄剤組成物。(A)アルキルスルホベタイン型界面活性剤 0.3~1.5質量%(B)直鎖脂肪酸アルカノールアミド型界面活性剤(但し、直鎖脂肪酸モノエタノールアミド型界面活性剤は除く) 3~5質量%(C)脂肪酸:脂肪酸のカリウム塩の質量比は1:99~0:100である脂肪酸及びそのカリウム塩 7~15質量%【選択図】なし
