1. A computer-readable storage medium having stored therein an image display program for stereoscopically displaying a captured image on a stereoscopically-viewable stereoscopic display member by displaying, in substantially a same display area, a right-eye image and a left-eye image by using a right captured image outputted from a right-eye real camera and a left captured image outputted from a left-eye real camera, wherein the image display program instructs a computer to function as: a reference distance setting section for setting a reference distance for a distance from the real camera in an image-capturing direction; and a stereoscopic display control section for displaying the right captured image in the display area so that a reference point in the right captured image is displayed at a center of the display area and displaying the left captured image in the display area so that a reference point in the left captured image is displayed at the center of the display area, wherein the reference point is a point that is away from the real cameras by the reference distance in the image-capturing direction of the two real cameras on a straight line passing through a median point between the two real cameras and extending in the image-capturing direction.