When displaying a stereo image of radiographic images, troublesome work for indicating an abnormal shadow with a three-dimensional cursor is reduced. An abnormal shadow detection unit 8c detects abnormal shadows from radiographic images for left and right eyes for displaying a stereo image. When a plurality of abnormal shadows are detected, an abnormal shadow specification unit 8d specifies abnormal shadows corresponding to each other in two radiographic images. A display control unit 8e gives a three-dimensional cursor to a predetermined abnormal shadow of the plurality of abnormal shadows, and displays a stereo image using the radiographic images for left and right eyes.