Biomaterials are those materials which have been engineered to interact with biological systems for used in basically medical purpose. to augment or replace a natural function. As a science, it’s been about fifty years old. Study of biomaterials is called biomaterials science or biomaterials engineering. Many companies investing huge amounts of money for the development of new products. It holds within elements of medicine, biology, chemistry, tissue engineering and materials science. A Bio composite is a composite material composed of matrix (resin) and a reinforcement of natural fibres.