There is provided a method for forming a hollow shaft with a flange directly in sheet metal. This method is a method for forming a hollow shaft having a flange portion 17 at the end thereof based on stamping performed on sheet metal 20. The method includes forming an upright portion 14 which is upright with respect to the surface of the sheet metal 20 by using a burring punch 320 and a burring die 310, and bending outward the free end portion of the upright portion 14 radially with respect to the central axis of the cylindrical portion by using a bending punch and a bending die. Here, the formed hollow shaft has the upright portion 14 protruding upright with respect to the surface and the flange portion 17 radially extending from the end of the upright portion.