The present  invention is directed towards a bone graft material, formable bone composition for application to a bone defect site to promote new bone growth. In particular, the present invention relates to a bone substitute material which is nano-composite membranous scaffold of a combination of Poly-L-Lactide-Co-Ε-Caprolactone, (PLC)/gelatin/nano-hydroxyaptite developed by the process of electrospinning