In a workpiece grinding method, a grinding allowance of a predetermined width (T) at at least an end surface portion 21 of a workpiece W is removed with a grinding wheel 10 (or 32) by rotating the workpiece W having a cylindrical portion 20 and the end surface portion 21 perpendicular thereto, by rotating the grinding wheel 10 (or 32) supported rotatably about an axis extending in parallel with the axis of the workpiece 10 (or 32), and by moving the grinding wheel 10 (or 32) relatively to the workpiece W. The method comprises a first grinding step of grinding the end surface portion 21 to an approximately right triangle shape in section by infeeding the grinding wheel 10 (or 32) from a grinding start position (S), where the grinding wheel 10 (or 32) overlaps the circumferential surface of the end surface portion 21 through the predetermined width (T) or a narrower width, toward an infeed end position (E) on the side of the cylindrical portion 20 in an oblique XZ-direction; and a second grinding step of removing a grinding allowance of the approximate right triangle shape in section left without being ground at the first grinding step, by feeding the grinding wheel 10 (or 32) in an approximately axial direction of the workpiece W