To provide a forming method and a forming apparatus of a metal part by which a manpower is saved due to a comparatively simple working process, a boss part for connection to a wheel shaft is formed together with a part of an outer peripheral part as required and a connection structure between the outer peripheral part and the boss part is simplified.

A rolling roller 4, which is moved in numerical control, is rolled on a receiving die 1, which is formed with a forming face for a metal part to be formed on an inner peripheral wall, along the forming face while holding an annular flat plate stock and rotating the receiving die 1, the annular flat plate stock is formed to a cylindrical metal formed part having a planned longitudinal cross sectional shape.