An image stabilization apparatus comprises a calculation unit configured to, based on a detection result of shake detection unit for detecting a shake of an image capturing apparatus, calculates an image blur correction amount for correcting an image blur by changing a relative position of a subject image and the image capturing element, wherein the calculation unit, based on information of an imaging lens that is used when capturing a captured image, calculates the image blur correction amount at a different scaling factor for each of a plurality of axes of a two-dimensional plane of the captured image.