PROBLEM TO BE SOLVED: To provide an endoscopic observation support device that supports the observation of hollow organs such as the colon, etc.SOLUTION: An endoscopic observation support device comprises: a virtual core line calculation unit 50 that calculates a virtual core line along a longitudinal direction of a hollow organ on the basis of three-dimensional image data an endoscope line calculation unit 52 that calculates an endoscope line showing the shape of an endoscope 24 inserted into the hollow organ a matching processing unit 54 that derives the correspondence relationship between the virtual core line and the endoscope line and an observation position estimating unit 56 that estimates an observation position of the endoscope 24 in the hollow organ on the basis of the correspondence relationship derived by the matching processing unit 54.
