Endoscope apparatus

An endoscope apparatus comprising:

• an endoscope insertion portion including:
• a treatment instrument channel for inserting a treatment instrument;
• and
• an observation device for observing a treatment target portion,
• wherein the endoscope insertion portion has an observation window, through which observation is performed using the observation device, and a channel opening of the treatment instrument channel formed on a distal end surface thereof, and various treatments are performed while a captured image obtained by the observation device is observed;
• characterized in that it further comprises:
• a pressing member for pressing or supporting a portion adjacent to the treatment target portion,
• wherein a vertical direction on the observed image during treatment is set in such a manner that the upper side of the vertical direction is the upper side on the distal end surface and the lower side thereof is the lower side on the distal end surface, and
• the pressing member is provided to move between a projection position where the pressing member is projected from the distal end surface and a retreat position where the pressing member is disposed at the distal end of the endoscope insertion portion so as to be retreated from the projection position, in a state where a position in the lower side from the observation window and in the lower side from the channel opening on the distal end surface is set to a base end portion of the pressing member, or a position in the upper side of the observation window and in the upper side from the channel opening on the distal end surface is set to a base end portion of the pressing member.