1. An inspection apparatus configured to perform position adjustment between a reference image and a target image of a printed document to inspect the printed document, the inspection apparatus comprising: an extraction unit configured to extract a feature point of each of the reference image and the target image used for the position adjustment; an acquisition unit configured to acquire an image in a band region of a predetermined size from each of the reference image and the target image; a position adjustment unit configured to perform a first position adjustment on the reference image and the target image in the band region, using the feature point in the band region extracted by the extraction unit; and a determination unit configured to compare the reference image and the target image after the first position adjustment and determines whether there is a difference between the reference image and the target image, wherein the position adjustment unit performs a second position adjustment using a feature point for the first position adjustment in the band region and a feature point for the position adjustment in a region adjacent to the band region in a case where the determination unit determines that there is a difference therebetween, and wherein the determination unit determines whether there is a difference between the reference image and the target image after the second position adjustment.