In an endoscope device 1 in accordance with the present invention, a navigation screen 51 is displayed. The navigation screen 51 includes: an endoscopic live image display area 52 in which a live image produced by a bronchoscope 2 is displayed; a VBS image display area 53 in which a VBS image is displayed; and a thumbnail VBS image area 54 in which images constructed by reducing VBS images that represent all branch points on a route are displayed as thumbnail VBS images representing branch points. Consequently, an endoscope can be reliably navigated to reach a target region using guide images that represent actual branch positions.