1. An image blur correction apparatus comprising: at least one processor configured to function as: a first detection unit configured to detect motion vectors in plural different areas using a plurality of images, a determination unit configured to determine an amount of movement of a main object based on the motion vectors in the plural different areas detected by the first detection unit, and a control unit configured to correct an image blur of the main object based on the amount of movement of the main object determined by the determination unit, wherein the determination unit determines a center of gravity or a peak movement amount of which value is included in a determination range near zero (0) among plural amounts of movement represented by the motion vectors in the plural different areas to be the amount of movement of the main object.