To provide an oil gel composition wherein the viscosity of the oily ingredient is adjustable regardless of the type of oily ingredient, and also to provide a cosmetic or an external skin preparation containing this oil gel composition.The oil gel composition containing the following ingredients (a) to (d) as essential ingredients:(a) a monoalkyl phosphate；(b) one or more neutralizing agents selected from basic amino acids and organic bases；(c) water and/or a polyol； and(d) an oily ingredient.
