Two types of cellulose fibers (10-40% by mass) were mixed with polylactide by an open-ended spiral-shaped injection molding. Tensile strength, impact strength and hardness of the composites were detd. The addn. of cellulose fibers resulted in deterioration of all mech. properties of polylactide but the composites can be used in some applications where any high mech. strength of the product is required.