An image processing apparatus comprises selection means (122) for selecting at least a first region of interest from regions of interest set in an imaging target, image obtainment means (110) for obtaining a first image representing the imaging target, and a second image from an imaging apparatus that images at least part of the imaging target, information obtainment means (135) for obtaining information of an existence range, and display control means (150) for adding, to the first image, displays representing positions of set regions of interest, and when the second image contains the existence range of the selected region of interest, displaying the existence range of the selected region of interest on the second image, and when the second image contains the existence range of an unselected region of interest, hiding the existence range information.
