An image processing apparatus allowing efficient trapping/overprint is provided. A CPU of a printer serving as the image processing apparatus includes an object extraction unit extracting a component image from image data, a pair extraction unit extracting a pair from a plurality of objects, a calculation unit calculating an overlapping print amount for each of primary colors of color materials of each component image, a rule storing unit storing a plurality of process contents and rules for executing processing, a process content storing unit storing the process contents, a judgment unit judging whether or not a pair of the image components satisfies the rule associated with a priority, and an execution unit for executing the processing of trapping or overprint.