To provide a method for regenerating a grinding wheel allowing the effective use of abrasive grains and other resources.

A vitrified grinding wheel is formed with its outer periphery grinding wheel portion bonded to a metal core. When it gets to a use limit, a residual part of the grinding wheel portion is removed from the core in a grinding wheel separating process 32. Then, is a bonding process 50, a new outer periphery grinding wheel portion, manufactured separately, is bonded to the core via an adhesive agent layer to regenerate the vitrified grinding wheel. Therefore, the limited residual part of the grinding wheel portion, which resides on the core (on the outer periphery face) when getting to the use limit and is removed therefrom, is only discarded. The abrasive grains and other resources can thus be effectively used.