The tip 6 of the endoscope 1 isFormed in the tip rigid part 21 andA first fitting hole 51 having a substantially rectangular cross section in which the imaging unit 35 is fitted is provided.Formed in the tip end hard portion 21 adjacent to the long side of the first fitting holeA second fitting hole 52 into which the connection pipe 25 to which the treatment tool insertion channel 26 is connected is fittedA plane 41 formed on the outer surface of the tip rigid portion 21 parallel to the long side andTwo curved surfaces 41a formed continuously with plane 41A slope 42 continuously formed on two surfaces 41a andThe cover member 31 is adhered to the wound roll 32.A stepped portion 43 having a bottom surface formed in the circumferential direction of the outer surface continuous to the slanted surface and a stepped portionIs provided.内視鏡１の先端部６は、先端硬質部２１に形成され、撮像ユニット３５が嵌合される断面略矩形状の孔部を有する第１の嵌合孔５１と、第１の嵌合孔の長辺に隣接するように先端硬質部２１に形成され、処置具挿通チャンネル２６が接続される接続管２５が嵌合される第２の嵌合孔５２と、長辺に平行に先端硬質部２１の外表面に形成された平面４１と、平面４１と連続して形成された２つの曲面４１ａと、２つの曲面４１ａに連続して形成された斜面４２と、被覆部材３１が糸巻接着３２され、斜面に連続して外表面の周方向に形成された底面を有して段形成された段部４３と、を具備する。
