PURPOSE: To thin off the thickness of a blade without decreasing rigidity by a method wherein the width in radial direction of an abrasive material layer bonded to a metal thin plate is set more than nine times of the thickness of the abrasive material layer including the metal thin plate.

CONSTITUTION: An inner circumferential cutting blade consists of a disc-shaped thin plate 14, consisting of a SUS 304 and the like, and an abrasive material layer 16 which constitutes a grinding blade part having the inner circumferential part provided with a diamond, CBN abrasive grain and the like. The thickness (t) of the thin plate 14 is set at 0.8 to 0.15mm, for example, in order to reduce the cutting margin and the blade thickness T of the abrasive material layer 16 is set 2 to 3 times of the plate thickness (t). Also, the blade width W should be larger than the ninefold of the blade thickness T, and the inner part of the abrasive material layer 16, i.e., the inside diameter (d) to the blade tip should be 200mm or larger. As the blade width W is larger than the ninefold of the blade thickness T, stress is given to the thin plate 14 when rotated, relatively high rigidity can be obtained, and cutting accuracy can be enhanced by the decrease in curved cutting and the like even when the blade thickness T is small. The edge thickness T can be reduced, and the yield of production can also be increased.