1. A medical image displaying apparatus that, by using a previously captured three-dimensional image of the tubular body, is capable of displaying a virtual endoscopic image in a tube based on a viewpoint set inside the tube of the tubular body, comprising: a capsule endoscopic image storage that stores capsule endoscopic images acquired by a capsule endoscope passing inside the tube; a display controller that displays the capsule endoscopic images based on the location of the viewpoint; a first central line extracting part that extracts a first central line of the tubular body based on the a previously captured three-dimensional image; and a correspondence calculating part that obtains a correspondence between the first central line and the capsule endoscopic images, wherein the display controller is configured to display the capsule endoscopic images based on the correspondence.