To provide a worm wheel having superior mechanical characteristics and a manufacturing method capable of improving a mass production property of a worm wheel and reducing manufacturing costs.

Multiple gear rings 53 with a designated width are obtained by forming blanks 73 and cutting the blanks 73 with a cutter or the like. Upon preparing the gear ring 53, after internally fitting and press-fitting a wheel 51 to the gear ring 53, the worm wheel 41 is obtained by firmly fixing and integrating the gear ring 53 and the wheel 51 by means of high frequency heating.