The present invention provides a kind of skin preparations for extenal use, as Chemical peeling agent the skin texture of peculiar improvement skin or the excellent effect of dimness, acne etc., though and have the appropriateness viscosity that does not drip remove be easy, easy what is coated with, and low irritant, safety are also good.Skin preparations for extenal use of the present invention contains: (a) being selected from one kind or two or more 1.0 ~ 7.0 mass %, (b) cross-linking type N of 'alpha '-hydroxy acids, 0.1 ~ 3.0 mass % of N- dimethyl allene vinegar amine -2- acrylamide -2- methyl propane sulfonic acid sodium copolymer and (c) aggregation tackifier 0.1 ~ 3.0 mass %, pH as (- 20/ hexamethylene diisocyanate of -240/ decyl tetradecyl alcohol polyethers of polyethylene glycol) copolymer are 2.0 ~ 5.0.本發明提供一種皮膚外用劑，其作為化學換膚劑所特有之改善肌膚的肌理或黯淡、痤瘡等之效果優異，且雖具有不滴落之適度黏度但洗除容易、易於塗布，而且低刺激性、安全性亦佳。本發明皮膚外用劑含有：(a)選自α-羥基酸之1種或2種以上1.0~7.0質量%、(b)交聯型N,N-二甲基丙烯醯胺-2-丙烯醯胺-2-甲基丙烷磺酸鈉共聚物0.1~3.0質量%、及(c)(聚乙二醇-240/癸基十四醇聚醚-20/六亞甲基二異氰酸酯)共聚物般之聚集性増黏劑0.1~3.0質量%，其pH為2.0~5.0。
