3D printing, as a rapid prototyping method is become more common nowadays world widely, including medicine too. The purpose of this article is to reveal the potential of using 3D printing in medicine, especially with a specific example of making a human thorax model from the very beginning of imaging diagnose to the physical model. There will be shown in details how the model of bones, lungs and heart had been created. The circumstances of the 3D printing will be discussed too.