In a grinding wheel for use in a grinding machine, a plurality of grinding tips (14) are bonded on the outer peripheral surface (13) of a wheel (10) core having a disk-like shape by bond. On both side surfaces (11) of the wheel core (10) are formed with depressions (12) continuous with the outer peripheral surface (13) of the wheel core (10). Bond is filled between the outer peripheral surface (13) and the grinding tips (14), and filled in the depressions (12) of the wheel core (10) to form a bonding layer (15). Namely, the bonding layer (15) has side portions (15b) which extends along both side surfaces (11) of the wheel core (10) in a radial direction.