PROBLEM TO BE SOLVED: To provide a skin detergent composition exhibiting good foaming property and foam quality (creamy texture), giving no slimy feeling during rinsing a skin, giving superior moist feeling of a skin after dried with a towel, and having superior low-temperature stability.SOLUTION: The skin detergent composition contains a fatty acid and its potassium salt by 15 to 40 mass% in total. In a mass ratio, the fatty acid to the potassium salt of the fatty acid is 10:90 to 2:98. The composition of the fatty acid comprises lauric acid of 30 to 65 mass%, myristic acid of 5 to 40 mass%, palmitic acid of 0 to 40 mass%, and stearic acid of 0 to 25 mass%.COPYRIGHT: (C)2012,JPO&INPIT【課題】泡立ち、泡質(クリーミィ性)が良好であり、すすぎ時にぬるつきが無く、タオルドライ後のしっとり感に優れ、低温安定性に優れた皮膚洗浄剤組成物を提供する。【解決手段】脂肪酸及びそのカリウム塩を合計で15~40質量%含有し、脂肪酸:脂肪酸のカリウム塩の質量比が10:90~2:98であり、前記脂肪酸組成がラウリン酸30~65質量%、ミリスチン酸5~40質量%、パルミチン酸0~40質量%及びステアリン酸0~25質量%であり、であることを特徴とする皮膚洗浄剤組成物。【選択図】なし