There is provided a method for producing a high-quality cellulose resin film which has fewer foreign matter-related faults, and therefore is excellent for optical applications. The method for producing a cellulose resin film, includes the steps of: melting a cellulose resin fed from a hopper in an extruder; feeding the molten resin from the extruder into a die; extruding the molten resin from the die to form a sheet; and cooling and solidifying the sheet, wherein the sheet has 30 or less foreign matters of 30 .mu.m or larger in size per square meter and 100 or less foreign matters of 5 .mu.m or larger in size per square meter.