As the environmental concerns are rapidly increasing in all aspects of industrial utilities, research in this regard is directed to develop a new environmentally friendly material as an alternate to the conventional materials. Biocomposite materials are highly heterogeneous in composition and isotropic in material properties. The study of the tensile strength of a newly developed biocomposite material will not give complete details regarding the fracture or failure initiation as the study will not consider cracks in specimens. Hence, it is required to study the fracture toughness of the material to evaluate the suitability of material for engineering applications. In this paper, investigations are carried out to determine the stress intensity factors of the jute fiber-reinforced hybrid polymer-matrix composite. © 2018 by Begell House, Inc.