PROBLEM TO BE SOLVED: To further easily specify a position of an endoscope distal end in a body, from the outside of the body.SOLUTION: A first coil 20 is provided at a distal end of an insertion part 16 of an electronic scope body 13. A signal processor 22 calculates a three-dimensional position of the first coil 20 and a three-dimensional position of a second coil 21 that is operable with it held in hand, by using a magnetic field generated by a magnetic field generator 23 including a third coil. A calculated physical relationship of the first coil 20 and the second coil 21 is configured into a three-dimensional graphic, and a monitor 24 displays it as the three-dimensional image from a prescribed point of view.SELECTED DRAWING: Figure 1【課題】より簡便に体内の内視鏡先端位置を体外から特定可能にする。【解決手段】電子スコープ本体１３の挿入部１６の先端に第１コイル２０を設ける。第３コイルを備える磁場発生装置２３により発生される磁場を用いて、第１コイル２０の３次元的な位置と、手持ち操作可能な第２コイル２１の３次元的な位置を信号処理部２２において算出する。算出された第１コイル２０および第２コイル２１の位置関係を３次元グラフィックスとして構成し、所定視点からの３次元画像としてモニタ２４に表示する。【選択図】図１
