1. An in-vehicle image display apparatus for use in a vehicle comprising: a state detecting device that detects a state of surroundings of the vehicle; a shape detecting device that detects a three-dimensional shape of an object to be detected in the surroundings of the vehicle; a display device that is provided at least in an entire front window section of the vehicle and capable of displaying information over the entire window section; an image generating device that generates image data for displaying a three-dimensional image representing the state of the surroundings of the vehicle on the display device based on detection results from the state detecting device and the shape detecting device; and a display control device that makes the display device display a three-dimensional image represented by the image data generated by the image generating device.