To provide a honing grinding wheel without breakage and peeling-off of a grinding wheel which is clear of adverse effects of a wheel spindle stock itself on working precision, and, moreover, is provided with a structure having a large range of use of the grinding wheel.

The quadrangular prismatic grinding wheel 5 is integrally joined and fixed to the wheel spindle stock 6. The joining structure of the grinding wheel 5 to the wheel spindle stock 6 is so composed that the inner diameter side bottom face and the rear face of the grinding wheel 5 are joined and fixed to the wheel spindle stock 6 to the rotating direction of a honing tool in a state of the wheel being mounted to the honing tool, and the outer peripheral grinding wheel face 10a and the front 10b are provided so as to be exposed.