PROBLEM TO BE SOLVED: To provide an endoscope which prevents the outer surface of a casing to be grasped by an inspecting person from becoming hot.SOLUTION: An endoscope 1 comprises: an insertion part 5； a casing 41 which has the proximal end of the insertion part 5 connected thereto and has a grip 2； heat generation parts (11, 12, 13) provided inside the casing 41； and a heat radiation part (14) which is provided inside a space 6 with openings (6a, 6b) formed in the casing 41 and thermally communicates with the heat generation parts (11, 12, 13).SELECTED DRAWING: Figure 3【課題】検査者が把持する筐体の外表面が高温になることを防止する内視鏡を提供する。【解決手段】内視鏡１は、挿入部５と、挿入部５の基端が接続され、把持部２を有する筐体部４１と、筐体部４１の内部に設けられた発熱部（１１、１２、１３）と、筐体部４１に形成された開口（６ａ、６ｂ）を有する空間６の内部に設けられた、発熱部（１１、１２、１３）と熱連通した放熱部（１４）と、を有する。【選択図】図３
