The present application relates to a fan blade 10 for an industrial axial flow fan. Said fan blade 10 includes an aerofoil 12 and a blade root 14, the blade root 14 being arranged proximal of the aerofoil 12 and configured for attaching the fan blade 10 to a hub 62 of an axial fan. The aerofoil 12 comprises a tip 22 at a distal end 23 and a base 24 at a proximal end 25, a leading edge 26 and an oppositely disposed trailing edge 28, whereby both edges 26, 28 extend from the tip 22 to the base 24. The aerofoil 12 has a variable thickness defined as a distance between a top surface 30 and a bottom surface 32. In addition, the aerofoil 12 is integrally formed in one piece from a composite material, wherein said composite material includes carbon fibres and a thermoplastic selected from the group of polyamide, polybutylene terephthalate and polypropylene.