To provide a forming method for a disk shaped stock where trimming for the outer circumference of a disk shaped stock is not needed, and strain and wrinkles are not generated upon drawing for forming an annular projecting part.

Since, to the inner circumferential part of a disk shaped stock 12 in which a tapered outer circumferential part 16 is beforehand formed in a tapered outer circumferential part forming stage 20, and whose tension is increased, an annular projecting part 10 is drawn in an annular projecting part forming stage 22, tension is generated between the tapered outer circumferential part 16 and the annular projecting part 10, and the stock is made hard to flow to the inner circumferential side, thus strain and wrinkles are not generated upon drawing for forming the annular projecting part 10. Further, since the tapered outer circumferential part 16 formed on the outer circumferential part of the disk shaped stock 12 is usable as being the size as it is, trimming for removing a flange part preliminarily bent to the outer circumferential part for beforehand imparting tension to the inner circumferential part of the disk shaped stock 12 is not needed.