PROBLEM TO BE SOLVED: To provide a skin base cosmetic to be applied to the skin before applying a foundation and the like, the skin base cosmetic not coming off with sweat or cold water and being easily removable from the skin together with a make-up without using a washing agent such as cleansing and facial cleanser when rubbed with warm water.SOLUTION: A skin base cosmetic to be applied to the skin before applying a skin make-up cosmetic has an aqueous phase comprising water as a continuous phase and contains (a) a hydrophobic polymer, (b) a polyhydric alcohol and (c) a hydrophilic nonionic surfactant, where the (a) hydrophobic polymer is 0.5 to 7 mass% in the cosmetic and dispersed as a particle in the aqueous phase, the (b) polyhydric alcohol is 0.5 to 5.5 pts.mass relative to 1 pt.mass of the (a) hydrophobic polymer, and the (c) hydrophilic nonionic surfactant is 1 to 5 mass% in the cosmetic. The skin base cosmetic can be all removed with warm water at 35 to 45°C when the skin make-up cosmetic is removed.