To provide a dressing method of an inner peripheral blade capable of improving life of the inner peripheral blade, by improving a variation in dressing accuracy by skill of a worker.

The dressing method of the inner peripheral blade is provided for locally dressing an edge by making the inner peripheral blade cut in a dress material by forming the edge by fixing an abrasive grain to an inner peripheral part of a doughnut-shaped thin plate. The dressing method of the inner peripheral blade automatically executes a process of selecting which side part of the left and right of the edge is dressed, by a control apparatus on the basis of the measured displacement direction and a displacement quantity of the inner peripheral blade by measuring the displacement direction and the displacement quantity of the inner peripheral blade by a measuring instrument and a process of locally dressing only the selected side part when dressing the edge.