To reduce weight as a hollow structure, eliminating the process of hardening by work hardening, and reduce noise generated at the time of rotation by forming a hollow drive shaft composed of a pipe material, forming both ends of the hollow drive shaft as a small diameter shaft part having a wall thickness by diameter contracting work, and applying work hardening by thinly forming a part formed between the small diameter shaft parts by means of ironing.

In one end of a pipe material 1, its outer diameter is contracted by dies so as to form a small diameter shaft part 3, and its wall thickness is set to about 4.5 to 5.0 mm. A core metal is inserted tightly as possible from the other end side of the pipe material 1, and ironing is carried out so as to set the wall thickness of the pipe material 1 to about 1.5 to 2.0 mm by dies remaining a range having a prescribed length on the other end part side. After that, the core metal is drawn out, and the diameter of a wall thickness part of the other end of the pipe material 1 is contracted in the same way as the case of the small diameter shaft part 3 by the dies so as to form a small diameter shaft part 7. Serrations 8, 9 for connecting to a front wheel driving system are worked on outer peripheral parts of the small diameter shaft parts 3, 7. It is thus possible to provide a hollow driven shaft wherein work hardening is applied by ironing.