PROBLEM TO BE SOLVED: To provide an endoscope apparatus capable of applying substantially uniform illumination light to both observation ranges of far-point observation and near-point observation.SOLUTION: An endoscope apparatus 1 includes: a distal end 10 of an insertion section 2 including objective optical systems 31, 32, and 33； an observation window 31 provided at the distal end 10； illumination windows 41 provided at the distal end 10 and applying illumination light Li of a prescribed first optical energy to a first observation surface IA spaced from the observation window 31 by a first distance； and reflection parts 51, 52, and 53 provided around the observation window 31, and including reflectors 51a, 52a, and 53a for applying reflection light Lr of a prescribed second optical energy to a region of a second observation surface IB spaced from the observation window 31 by a second distance, the region to which the illumination light of the prescribed first optical energy does not reach.SELECTED DRAWING: Figure 4【課題】遠点観察および近点観察における両方の観察領域に略均一な照明光を照射することができる内視鏡装置の実現。【解決手段】内視鏡装置１は、対物光学系３１，３２，３３を備えた挿入部２の先端部１０と、先端部１０に設けられた観察窓３１と、先端部１０に設けられ、観察窓３１から第１の距離に離間する第１の観察面ＩＡに所定の第１の光エネルギの照明光Ｌｉを照射する照明窓４１と、観察窓３１の周囲に設けられ、観察窓３１から第２の距離に離間する第２の観察面ＩＢの所定の第１の光エネルギの照明光が行き届かない領域に所定の第２の光エネルギの反射光Ｌｒを照射する反射面５１ａ，５２ａ，５３ａを有した反射部５１，５２，５３と、を具備する。【選択図】図４
