Collagen chitosan membrane derived from collagen of fish air bladder and chitosan from prawn shell is intended to be used as an artificial space making barrier over periodontal bony defects- specifically in infrabony 2-3 walled defects and grade II furcation defects in dentistry and as covering membrane preventing fluid loss and blood loss in burns/wounds during healing. It finds applications in plastic surgery also. Collagen-Chitosan films are flexible, tough, transparent, clear and oxygen permeable with good tensile strength.