The endoscope holding device, forming an opening which opens to the distal end in communication with the insertion path in order to form an insertable inserting channel of an endoscope, and to project the endoscope from the distal end of the insertion path a retraction portion having an insertion portion that is, the retraction surface for retraction biological tissue for a predetermined direction, are disposed at the distal end of the insertion portion, extending toward the distal side of the opening, I have a.この内視鏡保持装置は、内視鏡を挿通可能な挿通路を形成し、その挿通路の先端から内視鏡を突出させるために前記挿通路に連通して先端に開口した開口部が形成された挿入部と、所定の方向に対して生体組織を圧排する圧排面を有し、前記挿入部の先端に配置され、前記開口部よりも遠位側に向かって延出した圧排部と、を有する。
