In this experimental study, the performance of injection-molded short cellulosic fiber/plasticized starch acetate composites is analyzed in terms of stiffness and strength. Parameters involved in the analysis are a variable fiber and plasticizer content. The measured strength of the composites varies in the range 12–51 MPa, whereas the stiffness varies in the range 1.1-8.3 GPa, which is significantly higher than the properties of unreinforced matrix.