To provide a shape measuring method for a grinding tool surface capable of improving measuring precision and shortening a measuring time.

A shape measuring method for a grinding tool surface comprises the processes of applying air from a dewatering air nozzle 3 to a grinding tool to blow coolant adhering on the grinding tool and identifying that the output of an air micrometer 5 is stabilized and of measuring the shape on the surface of the grinding tool in its vertical direction at a measurement point where an air micrometer nozzle 2 is spaced form the surface of the grinding tool in its vertical direction.