The tensile test of the PBS/sawdust wood and the toughened PLA/rubber wood composites was conducted according to ASTM D 638 by using a Universal Testing Machine (INSTRON,5567). The dimensions of each dumbbell test specimen were 165 mm long, 13 mm wide and 3 mm in thickness, the gauge length was set at 5 N. Rectangular specimens of 12.7x96 mm and 3 mm in thickness were also injected for the flexural test. A three-point bending test with a support span of 48 mm was carried out at room temperature by using a Universal Testing Machine (INSTRON,5567) and following the procedure of ASTM D790. The crosshead speed was set at 1.2 cm/min. The impact test was conducted by using an Izod impact tester (Yasuda, 190) following the procedure in ASTM D256. All of the tensile, the flexural and the impact properties reported were averaged from the results obtained from five tested samples.