To provide an edge surface grinding tool capable of providing an edge tool having large edge thickness and excellent durability.

An edge surface grinding tool is provided with a grinding wheel 2 of a toroidal shape, is driven to rotate about an axis thereof, and makes an inner peripheral edge 2a as a grinding portion 2b. For example, when a cutting edge 7 of an edge tool 5 is ground by the edge surface grinding tool of this structure, on the cutting edge 7 part obtained by the grinding process, edge surfaces 7a, 7 are made to be a convex arc surface having a curvature corresponding to the curvature of the inner peripheral edge 2a of the grinding wheel 2, and has a thick shape in a middle part in a cross section to have excellent durability and high stiffness in a thickness direction of the cutting edge 7.