Groove polishing method, groove polishing apparatus, and storage medium

The invention provides a groove grinding method, a groove grinding apparatus, and a storage medium, which can inhibit generation of unground parts after grinding. A groove grinding method for sequentially grinding a plurality of grooves provided at predetermined angular intervals on the outer peripheral surface of a shaft using a grinding wheel, in which all of the plurality of grooves are ground by a machining step including a control step. The control step includes: a control step of determining a position or region on an outer periphery where a maximum point or a minimum point of vibration of the center-aligned shaft exists; a control step in which a groove present in the position or the region among the plurality of grooves is used as a first polishing groove to be polished initially, and the first polishing groove is polished while the center of the first polishing groove is aligned with the center of the grinding wheel; and a control step for sequentially rotating the shaft at a predetermined angle inte