A method for forming a pulley for an electromagnetic clutch in which an inner hub and an outer hub are formed in the same direction with respect to a friction surface comprising: the steps of: - fixing an edge of an opening of a plate working piece by means of a first upper mandrel ring installed at a lower end of a first supporting pin of a first forming device after disposing the plate working piece having the opening at a center portion thereof on a supporting block and a supporting ring, the supporting block being installed around an upper end of a first spindle so as to rotate along with the first spindle of the first forming device, the supporting ring being disposed around the supporting block; - inwardly pressing an upper surface of the plate working piece which is rotated along with the first spindle by a first pressing roller to reduce a thickness of the plate working piece while performing a drawing the plate working piece around the first upper mandrel ring, so as to form the inner hub; - disposing an outer region of the inner hub between a second upper mandrel ring and a second lower mandrel ring installed at an upper end of a second spindle of a second forming device, so as to fix the plate working piece to the second spindle to rotate along with the second spindle; - forming a convex bead portion by pressing an edge of the plate working piece rotating along with the second spindle by means of a second pressing roller; - forming a flat bead portion by pressing the convex bead portion in a direction to the inner hub by means of a third pressing roller and by drawing an outer hub forming portion, so as to make a first semi-manufactured pulley; - disposing a region defined by the inner and outer hub forming portion between a third upper mandrel ring and a third lower mandrel ring installed at an upper end of a third spindle of a third forming device, so as to rotatably fix the first semi-manufactured pulley to the third spindle; - pressing the outer hub forming portion of the first semi-manufactured pulley, which rotates along with the third spindle, by means of a fourth pressing roller so as to form the outer hub; and - pressing an outer peripheral surface of the outer hub by means of a fifth pressing the roller to form a shape of the outer hub in a space defined by an outer peripheral surface of the fifth pressing roller and a step portion of the third lower mandrel ring and the fifth pressing roller, while forming grooves on the outer peripheral surface of the outer hub so as to make a second semi-manufactured pulley having a V-profile. - fixing an edge of an opening of a plate working piece by means of a first upper mandrel ring installed at a lower end of a first supporting pin of a first forming device after disposing the plate working piece having the opening at a center portion thereof on a supporting block and a supporting ring, the supporting block being installed around an upper end of a first spindle so as to rotate along with the first spindle of the first forming device, the supporting ring being disposed around the supporting block; - inwardly pressing an upper surface of the plate working piece which is rotated along with the first spindle by a first pressing roller to reduce a thickness of the plate working piece while performing a drawing the plate working piece around the first upper mandrel ring, so as to form the inner hub; - disposing an outer region of the inner hub between a second upper mandrel ring and a second lower mandrel ring installed at an upper end of a second spindle of a second forming device, so as to fix the plate working piece to the second spindle to rotate along with the second spindle; - forming a convex bead portion by pressing an edge of the plate working piece rotating along with the second spindle by means of a second pressing roller; - forming a flat bead portion by pressing the convex bead portion in a direction to the inner hub by means of a third pressing roller and by drawing an outer hub forming portion, so as to make a first semi-manufactured pulley; - disposing a region defined by the inner and outer hub forming portion between a third upper mandrel ring and a third lower mandrel ring installed at an upper end of a third spindle of a third forming device, so as to rotatably fix the first semi-manufactured pulley to the third spindle; - pressing the outer hub forming portion of the first semi-manufactured pulley, which rotates along with the third spindle, by means of a fourth pressing roller so as to form the outer hub; and - pressing an outer peripheral surface of the outer hub by means of a fifth pressing the roller to form a shape of the outer hub in a space defined by an outer peripheral surface of the fifth pressing roller and a step portion of the third lower mandrel ring and the fifth pressing roller, while forming grooves on the outer peripheral surface of the outer hub so as to make a second semi-manufactured pulley having a V-profile.