To provide a method for producing the subject textured yarn capable of imparting a fabric with spun-like fluffy feel and puffiness and representing multicolor grain-toned effect.

A cation-dyeable highly oriented polyester undrawn yarn A and a polyamide drawn yarn B are arranged parallel with each other and subjected to false twist crimping into a composite crimped yarn D with a yarn length difference of ≥5%. Subsequently, the composite crimped yarn D and a polyester-based potentially crimping composite filament yarn C are subjected to air jet processing simultaneously; at this time, the feed of the yarn D is set at a level ≥5% greater than that of the filament yarn C so as to afford ≥100/m of loop fluffs mainly of the yarn D on the yarn surface.