To provide a light alloy wheel manufacturing method for mass production with much more accuracy than a current method.

This light alloy wheel manufacturing method has a process for casting a wheel raw material formed of a rim part 34 and a disc part 32, a process for lathing at least one part of the rim part 34 so that thickness is uniformed along the circumferential direction, a post-heating process, and a process for machining the rim part 34 to a final product shape. With this method, a vehicle wheel having wheel diameter of 16 inches or more, restricted in error within 0.30 mm in an inside bead seat part, and restricted in error within 0.20 mm in an outside bead seat part can be manufactured.