A skin cosmetic comprising the following ingredients (A), (B), and (C), and also satisfying the condition (D): (A) .beta.-alanyl-L-histidine and/or its salt (B) A thickener consisting of a microgel obtained by radical polymerization of water soluble ethylene-type unsaturated monomers dissolved in the dispersion phase in a composition having an organic solvent or an oil component as the dispersion medium and water as the dispersion phase. (C) Inorganic acid and/or organic acid (D) The pH of the skin cosmetic at 25.degree. C. is 5.0 or higher and lower than 8.0. The present invention provides a skin cosmetic having superior sensation during use and stability and also maximally manifesting the various effects of ingredient (A), which is .beta.-alanyl-L-histidine and/or its salt, by preparing a mildly acidic skin cosmetic by characteristically using ingredient (A) and ingredient (B), which is a thickener composed of a specific microgel chosen from many cosmetic thickeners, and adding ingredient (C), which is an inorganic acid and/or organic acid.