PURPOSE: To obtain the fat-containing acidic milk beverage stable for a long period on its distribution at the ordinary temperature.

CONSTITUTION: Both chitosan and a polyglycerol fatty acid ester are added to a fatty acid-containing acidic milk beverage to obtain the fat-containing acidic milk beverage stabilized in its fat spheres under an acidic condition, prevented in the formation of a cream layer produced by the flotation of the fat spheres during its distribution, and capable of being distributed at the ordinary temperature.