Cellulose nano〓bers (CNFs) are a fundamental component of plant cell walls, and 〓bers of 4 to 20nm width can be obtained by simple disintegration of paper pulp. Since the nano〓bers are made of semi-crystalline extended cellulose chains, they exhibit high elasticity (approximately 140GPa), high strength (approximately 3GPa), and low thermal expansion (approximately 0.1ppm〓K), with a density of 1.6g〓cm3. Because of these excellent mechanical properties and their high speci〓c surface area, the utilization of CNFs has gained increasing attention across the world. In this paper, after reviewing the production of CNFs reinforced plastics and their utilizations, the future perspective of CNFs materials for structural application will be introduced.