1. A computer-readable storage medium having stored therein an information processing program to be executed by a computer of an information processing apparatus which displays a stereoscopically visible image of a virtual three-dimensional space taken by a virtual stereo camera, on a display apparatus capable of displaying a stereoscopically visible image, the information processing program causing the computer to function as: preferential display object placing means for placing a preferential display object in an imaging range of the virtual stereo camera in the virtual three-dimensional space; stereoscopically visible image rendering means for taking the virtual three-dimensional space using the virtual stereo camera, and rendering a stereoscopically visible image of the virtual three-dimensional space; and display control means for causing the display apparatus to display the stereoscopically visible image rendered by the stereoscopically visible image rendering means; wherein the stereoscopically visible image rendering means renders the preferential display object by using a parallax based on a first depth from the virtual stereo camera, and according to a preference order based on a second depth, which is shallower than the first depth, from the virtual stereo camera.