A stereoscopic image radiographing apparatus performing both an equal-magnification radiographing operation and an enlarged radiographing operation displays a stereoscopic image with a magnitude of parallax suitable for both radiographing operations without changing two focal positions of radiation. Two radiological images are relatively moved and displayed in a parallax direction which is obtained by projecting an extending direction of a straight line connecting two focal positions onto the corresponding radiological image based on the angle formed by two radiographing directions of two radiological images constituting the stereoscopic image and the enlargement ratio thereof.
