To obtain a cellulose ester film capable of being rapidly allowed to gel, having excellent physical and optical properties, and useful as a photographic material, etc., by processing a cellulose ester solution by a solvent cast method.

This method for producing a cellulose ester film comprises dissolving (A) a cellulose fatty acid ester mixture obtained by esterifying the hydroxy groups of cellulose with acetyl groups and ≥3C acyl groups in (B) an organic solvent selected from the group consisting of 3-12C esters, 3-12C ketones and 3-12C ethers, mixing the prepared cellulose ester solution with (C) an alcohol having a boiling point of 30-170°C or (D) a hydrocarbon having a boiling point of 30-170°C, casting the prepared mixture on a support and subsequently evaporating the solvents. The component C or D is preferably used in an amount of 5-60 pts.wt. per 40-95 pts.wt. of the component B.