PROBLEM TO BE SOLVED: To provide an endoscope apparatus that can provide a good observation performance by reducing the generation of flares caused by a fact that the light from an illumination window directly enters an observation window.SOLUTION: The endoscope apparatus includes an illumination window 41 for causing illuminating light to exit and an observation window 45 for obtaining an image of a subject, at an end face 67 of an endoscope insertion part that is inserted into the subject. The illumination window 41 is an illuminating lens having a positive-power light exit surface. The relationship between the maximum projection height Hi of the illumination window 41 that projects in the axial direction of the endoscope insertion part from the end face 67 of the endoscope insertion part and the maximum projection height Ho of the observation window 45 satisfies Ho&geHi.COPYRIGHT: (C)2012,JPO&INPIT【課題】照明窓からの光が直接観察窓に入り込むことによるフレアの発生を抑制し、これにより良好な観察性能が得られる内視鏡装置を提供する。【解決手段】内視鏡装置は、被検体内に挿入する内視鏡挿入部の先端面67に、照明光を出射する照明窓41と、被写体像を取得する観察窓45とを有する。照明窓41は、正のパワーの光出射面を有する照明レンズであり、内視鏡挿入部の先端面67から内視鏡挿入部の軸方向に突出する照明窓41の最大突出高さHiと、観察窓45の最大突出高さHoとの関係が、Ho ≧ Hiを満たすようにした。【選択図】図3
