A polishing device includes a polishing table comprising a polishing surface, a top ring configured to press a polishing target surface against the polishing surface and comprising a plurality of pressing portions configured to independently apply a pressing force to a plurality of areas of the wafer, and a controller configured to store a first pressing portion effect rate for a first pressing portion of the plurality of pressing portions in a storage unit, the first pressing portion effect rate being a change in polishing amount of the polishing target surface for a change in pressing force applied by the first pressing portion and control the pressing force applied by the first pressing portion based on the first pressing portion effect rate and a polishing profile of the polishing target surface.