An image processing apparatus includes: an acquisition unit configured to acquire viewpoint information indicating a viewpoint; a generation unit configured to generate a determined-viewpoint image based on a plurality of captured images captured from a plurality of directions and the viewpoint information acquired by the acquisition unit, wherein the generation unit performs an inclination correction process for correcting an inclination, according to the viewpoint information, of the determined-viewpoint image; and an output unit configured to output the determined-viewpoint image generated by the generation unit.