The present invention provides an endoscope capable of more reliably observing bending of the large intestine. An endoscope according to an embodiment of the present invention includes a distal end portion, a bending portion and an insertion portion in which a front photographing device is provided, and at least one groove is formed in a side surface of the insertion portion. Wherein the groove includes a first inclined surface which is inclined downward toward the rear of the endoscope and the rear imaging device, the illumination portion and the lens cleaning nozzle are disposed on the first inclined surface toward the rear of the endoscope For example.本発明は、大腸の屈曲をさらに確実に観察できる内視鏡を提供する。本発明の一実施例による内視鏡は、前方撮影装置が設けられている先端部、湾曲部及び挿入部を備え、前記挿入部の側面に少なくとも１つの溝が形成される。前記溝は、内視鏡の後方に行くほど下向に傾斜する第１傾斜面を含み、前記第１傾斜面に内視鏡の後方に向かう後方撮影装置と、照明部と、レンズ洗浄ノズルが設けられる。
