This special issue of Journal of Renewable Materials contains the contributions of authors in attendance at the 4th International Conference on Biobased Materials and Composites(ICBMC’17)held at the INRA-BIA unit in Nantes,France.This conference is one of the most successful scientific events in the field of biobased materials and composites.The goal of the ICBMC conferences is to foster an understanding of scientific and technical progress,and knowledge of the field of natural polymers extraction,biopolymers,biomaterials and their blends,composites,and biobased materials for energy conversion and IPNs.