As for the endoscope, in order to observe the path of insertion of the Tip and the Tip which are provided in the Tip of the interposition section, paralleling the direct-vision observation window which in order to face, can provide the path of insertion and in order to observe lap the direction of the Tip, on the rim edge strip, the reflection which was formed long the side which was formed compared to the optical radiation component and the side-view observation window which possess the radiation end face which radiation it does light in the end face side, the radiation end face of the optical radiation component compared to according to the circumferential direction of the Tip rim edge strip to Tip direction of the side-view observation window and the Tip which possess apparent observation range of visionIt possesses the section, the radiation end face of the optical radiation component making the light which radiation is done lap direction of the Tip reflect with the reflected section, the illumination reflected section which illuminates the observation range of vision side of the side-view observation window and, it possesses.内視鏡は、挿入部の先端に設けられた先端部と、先端部の挿入方向を観察するために、挿入方向を向くように設けられた直視観察窓と、先端部の周方向を観察するために、外周側面に沿って形成された側視の観察視野を有する側視観察窓と、先端部の先端方向へ光を出射する出射端面を有する光出射部材と、側視観察窓よりも基端側において、光出射部材の出射端面よりも先端部外周側面の円周方向に沿って長く形成された反射部を有し、反射部により光出射部材の出射端面が出射した光を先端部の周方向へ反射させて、側視観察窓の観察視野側を照明する照明反射部と、を具備する。
