[Problems to be Solved] When displaying a stereoscopic image representing left and right breasts at the same time in the same image by combining the chest walls of the left and right breasts so as to face to each other, displaying the left and right breasts such that front-back directions of the breasts agree with each other in the stereoscopic image. [Means for Solving the Problems] Generating a right-eye image by combining a right-side capturing image (4° capturing image) of a right breast with a left-side capturing image (0° capturing image) of a left breast rotated by 180° such that the chest walls of the breasts face to each other and a left-eye image by combining a left-side capturing image (0° capturing image) of the right breast with a right-side capturing image (4° capturing image) of the left breast rotated by 180° such that the chest walls of the breasts face to each other. Based on the right-eye and left-eye images generated in the manner described above, displaying a stereoscopic image on a monitor.
