An endoscope includes an insertion section to be inserted into a subject, an operation section connected to the proximal end side of the insertion section, an observation section disposed at the distal end of the insertion section and observing the subject, A treatment tool insertion passage through which a treatment tool for applying a treatment to the subject is inserted and protrudes from the distal end portion of the insertion portion and a treatment tool insertion passage provided at the distal end of the treatment tool insertion passage, A distal end bending portion that bends according to the operation and raises the treatment tool, and an exterior portion that is provided so as to cover the distal end bending portion. Thereby, an endoscope having good washing efficiency is provided.内視鏡は、被検体内に挿入される挿入部と、前記挿入部の基端側に連設された操作部と、前記挿入部の先端に配設され、前記被検体を観察する観察手段と、前記被検体に対して処置を施す処置具を挿通し、前記挿入部の先端部から突出させる処置具挿通路と、前記処置具挿通路の先端に配設され、前記操作部の起上操作に応じて湾曲し、前記処置具を起上させる先端湾曲部と、前記先端湾曲部を覆うように設けられた外装部と、を備える。これにより、洗浄効率が良好な内視鏡を提供する。
