Polysaccharides and their composites are highly promising materials for food, pharmaceutical and biomedical applications; including drug delivery, tissue engineering and packaging. Fiber- and nano-reinforced composites are good alternatives to non-biodegradable petroleum‐based polymers. The great advantage of these materials is that they are both environment friendly and nontoxic. Keywords: Polysaccharides, Polysaccharide Composites, Drug Delivery, Tissue Engineering, Pharmaceutical Packaging, Food Packaging , Environment Friendly Materials, Nontoxic Materials, Wound-Healing Sponge, Skin Lesions, Chitosan Composites, Nanocellulose, Starch-Based Composites.