In recent years, Fiber Reinforced Thermo Plastic composite material (FRTP) have been widely used as a material for metal replacement parts in automobiles and other vehicles to reduce weight. The strength of FRTP is greatly affected by the fiber content, fiber length, and fiber dispersion. In this study, we focused on the direct molding method, in which fiber and resin mixing and injection molding are performed simultaneously, as a method that is expected to improve the remaining fiber length for the purpose of increasing strength. In the direct molding process, it is known from past studies that fiber breakage can be reduced by allowing the resin to melt completely before merging with the fibers. It is common practice to add reinforcing fibers to the melting section when granulating with a kneading extruder. We changed the concept and devised a new direct molding method in which the fibers are fed and then merged with the fully melted resin. A model machine using simulated materials was used to clarify the fiber breakage mechanism, and a part of the screw shape was given a shape that suppressed fiber breakage, and a prototype machine was fabricated based on the results. Molding experiments were conducted using GF as the reinforcing fiber and PP as the matrix, and the fiber length and dispersion were measured and evaluated. As a result, it was confirmed that it was possible to produce molded products with a fiber weight content within ±5 wt% of the target of 40 wt%, that the fiber breakage rate could be suppressed to less than 20% under all conditions, and that the fiber dispersion was improved by the dulmage shape given to the screw tip.