The biopsy system includes an endoscope having an insertion portion having a curved portion which can be bent along a predetermined curved surface in response to an operation of an operation portion, and a needle tube, and is inserted into the endoscope , And a treatment tool for an endoscope which can be fixed to the endoscope by a fixing portion in a state of being inserted into the endoscope, wherein a part of a distal end side of the needle tube is crushed in a radial direction , Wherein the endoscope treatment instrument is a flat portion having a long axis and a short axis, and the endoscopic treatment instrument is configured such that, in a state of being inserted into the endoscope, the short axis of the flat portion of the needle tube and the curved surface Are fixed by the fixing portion so as to be parallel to each other.生検システムは、操作部の操作に応じて所定の湾曲面に沿って湾曲可能な湾曲部を有する挿入部を備えた内視鏡と、針管を有し、前記内視鏡に挿通されるとともに、前記内視鏡に挿入された状態において、固定部により前記内視鏡に固定可能な内視鏡用処置具と、を備え、前記針管は、先端側の一部が径方向につぶされて、長軸と短軸とを有する扁平部とされており、前記内視鏡用処置具は、前記内視鏡に挿通された状態において、前記針管の扁平部の前記短軸と前記湾曲面とが平行になるように前記固定部により固定される。
