A stereoscopic image that is easily viewed by a patient and is capable of reducing the burden on the patient is displayed, and a stereoscopic image for interpretation which includes detailed image information and is viewed by, for example, a doctor is displayed. A radiological image displaying method that radiates radiation to a subject from the two different imaging directions, acquires two radiological images detected by a radiological image detector, and displays a stereoscopic image on a display unit based on the two acquired radiological images, and this method includes: performing image processing on the two radiological images to abstract image information included in the radiological images and displaying a stereoscopic image based on two abstracted radiological images which are subjected to the image processing and a stereoscopic image based on two radiological images including the image information which is more detailed than that of the abstracted radiological images.
