The present invention provides a thermoplastic resin molded product that can be manufactured in a short measuring time. A method for manufacturing a thermoplastic resin molded product having a volume of 15cm3 or less, said method including molding pellets which are obtained by cutting thermoplastic-resin-coated and roving reinforcing fibers and which have an average length of 3.0 to 7.0mm using an injection molding machine, wherein the ratio of the average length of the pellets to screw pitch is 0.25 or less.
