An object is to provide a method for producing a liquid crystal polyester composition which is excellent in mechanical strength and has semiconductivity. The present invention provides a method for producing a liquid crystal polyester composition, which includes the step of melt-kneading a liquid crystal polyester in the amount of 85 to 99 parts by mass and a nanostructured hollow-carbon material in the amount of 1 to 15 parts by mass, based on 100 parts by mass in total of the liquid crystal polyester and the nanostructured hollow-carbon material, under shear rate of 1,000 to 9,000/second, the nanostructured hollow-carbon material including a carbon part and a hollow part, and having such a structure that a part or all of the hollow part is surrounded by the carbon part.