PROBLEM TO BE SOLVED: To provide a device capable of checking a position of an endoscope insertion portion easily with a simple structure.SOLUTION: An endoscope insertion state observation device includes: a transmission signal generation unit 51 that is provided in an endoscope insertion portion inserted into a subject and generates a transmission signal a position detection unit 31 which has a reception unit 41 that receives the transmission signal and is arranged movably in the outside of the subject a distance calculation unit that determines a positional relationship between the transmission signal generation unit and the reception unit on the basis of the reception result of the reception unit and calculates the distance between the transmission signal generation unit and the reception unit on the basis of the determined positional relationship and presentation units 7, 8 that present information on the distance calculated by the distance calculation unit.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】簡単な構成で且つ容易に内視鏡挿入部の位置を確認できる装置を提供する。【解決手段】被検体に挿入される内視鏡挿入部に設けられて送信信号を発生する送信信号発生部51と、送信信号を受信する受信部41を有し、被検体外部に移動自在に配置される位置検出部31と、受信部の受信結果に基づいて送信信号発生部と受信部との間の位置関係を求め、求めた位置関係に基づいて送信信号発生部と受信部との間の距離を算出する距離算出部と、距離算出部が算出した距離に関する情報を提示する提示部7,8とを具備する。【選択図】図1
