Disposal tool for this biopsy has the sharp Tip, from the first aperture and the aforementioned first aperture which in system are provided in the Tip of the thorn entrance possible needle tube and the aforementioned needle tube is provided on end face side, the second aperture which is communicated to the lumen of the aforementioned needle tube and, has, as for the aforementioned second aperture, Tip side and end face side are formed by curved line condition in the profile of depth direction, the basic destal of Tip side and the Tip of end face side form acute angle vis-a-vis the axis of the aforementioned needle tube.この生検用処置具は、鋭利な先端を有し、組織に刺入可能な針管と、前記針管の先端に設けられた第一開口と、前記第一開口より基端側に設けられ、前記針管の内腔に連通する第二開口と、を備え、前記第二開口は、深さ方向の断面において、先端側と基端側が曲線状に形成され、先端側の基端部と基端側の先端部が前記針管の軸線に対して鋭角をなしている。
