Adding willow-fiber caused a reduction in specific flexural strength and in specific tensile strength of all foamed and unfoamed PLA/willow-fiber composites. However, addition of willow-fiber increased the specific tensile modulus and specific flexural modulus of the unfoamed composites which were found maximum at 30wt% willow-fiber content. Specific notched impact strength of the foamed composites show increasing trend. Foamed PLA/ willow-fiber (80/20) and (70/30) composites shows 15.9 and 45.5% improvement in specific notched impact strength respectively compared to their unfoamed counterparts.