1. A computer-readable storage medium having stored therein a display control program to be executed by a computer of a display control apparatus which stereoscopically displays a predetermined two-dimensional object on a display device, the display control program causing the computer to execute: obtaining a depth value in accordance with a state of a virtual three-dimensional space captured by a virtual stereo camera; synthesizing an image for left eye and an image for right eye which are obtained by shifting the two-dimensional object, in order to generate parallax, by a shift amount in accordance with the obtained depth value, with an image for left eye and an image for right eye which are obtained by capturing a predetermined three-dimensional object positioned in the virtual three-dimensional space by the virtual stereo camera, respectively, and rendering the respective synthesized images, thereby generating a stereoscopic image; and stereoscopically displaying the generated stereoscopic image on the display device.