PROBLEM TO BE SOLVED: To upgrade the insertion property of an endoscope unit into the inside of a subject filled with a fluid.SOLUTION: An endoscope unit including an elongated insertion part 2 that is inserted into the inside of a subject includes an internal part 30 that is inserted into the inside of the insertion part 2 from a distal end to a proximal end in an inserting direction of the insertion part 2, an external coating member 29 that is disposed on the periphery of the insertion part 2 in the longitudinal direction of the insertion part 2 and has a substantially constant outer diameter, and a porous member 28 that is disposed between the external coating member 29 and the internal part 30 and used to adjust the balance of a buoyancy and weight which are applied when the insertion part 2 is inserted into the inside of the subject.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2016,JPO&INPIT【課題】内視鏡装置において、液体が満たされている被検体の内部への挿入性を向上することができるようにする。【解決手段】被検体の内部に挿入するため長尺の挿入部2を有する内視鏡装置であって、挿入部2の挿入方向の先端側から基端側に向かって、挿入部2の内部に挿通された内通部30と、挿入部2の長手方向にわたって挿入部2における外周部に配置され、略一定の外径を有する外部被覆部材29と、外部被覆部材29と内通部30との間に配置され、挿入部2が被検体の内部に挿入された際に受ける浮力と重量とのバランスを調整するための多孔質部材28と、を備える構成とする。【選択図】図3
