Pseudo three dimensional medical images that facilitate diagnosis of bone regions are generated from a plurality of medical images. An image processing apparatus (10) includes: an image obtaining section (1) for obtaining medical images that represent transverse cross sections of a subject, and a division line setting section (2), for setting division lines within each medical image that divide subject regions representing the subject front to back, such that thoracic bones in the front to back direction of the projection direction of the subject are not displayed in an overlapping manner within the pseudo three dimensional images. A pseudo three dimensional medical image generating section (3) generates a first pseudo three dimensional medical image based image data representing subject regions toward first sides of the division lines within the medical images, and generates a second pseudo three dimensional medical image based on image data representing subject regions toward second sides of the division lines within the medical images, by executing intensity projection methods.
