A diamond saw blade (D) comprising diamond grindstones (2) attached to the outer peripheral edge of a disc-shaped substrate (1), wherein a ratio of a second value (total areas of end faces (e) of the diamond grindstones (2)) to a first value (calculated by multiplying a periphery length of a circle having a diameter which is a maximum outside diameter of the diamond saw blade (D) by a maximum thickness (t) of the disc-shaped substrate (1)) is at least 0.3 and up to 1.0.
