In an image processing apparatus for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by the optical system into an electric signal, a group of correction data, which is calculated on the basis of relative positional information of an optical axis of the optical system and a center of an effective range of the image sensing element, for correcting an image sensed by the image sensing unit is read out from a storage unit, and the image is corrected based upon the group of correction data read out from the storage unit. A minimum value of the group of correction data is associated with a position substantially coinciding with the optical axis position on the image sensing element or a position between the optical axis of the optical system and the center and closer to the optical axis.