To manufacture a bobbin for a race track type coil easily and for a short time, and to intend to lower a cost.

In a method for manufacturing the long cylindrical bobbin for winding a conductor wire on an outer peripheral face to form the race track type coil, a molding plate having the outer peripheral face reduced by a thickness portion of the bobbin of the race track type coil is manufactured of a fiber reinforced resin having a metal or rigidity, the molding plate is mounted on a processing bed, and a half-cured prepreg tape having a width of a conductor wire width or less is wound on the outer peripheral face of the molding plate a plurality of turns. After winding, a pressing jig is pressed onto at least an outer face and an upper face on both sides of a straight line part from outward, then the prepreg tape is heated at a curing temperature of the prepreg tape and is cured to form the bobbin, and thereafter the cured bobbin is detached from the molding plate.