Endoscope with treatment tool delivery port and elevator

An endoscope comprising:

• a distal end part body that is provided on a distal end side of an insertion part and has a distal end, a proximal end, and a longitudinal axis;
• a treatment tool delivery port that is formed in the distal end part body and delivers a treatment tool inserted into the insertion part;
• an elevator that is rotatably supported in the treatment tool delivery port of the distal end part body and controls a delivery direction of the treatment tool delivered from the treatment tool delivery port;
• and
• a first illumination window that is provided on the distal end part body, the first illumination window is configured to emit illumination light,
• a second illumination window provided at a position on an other direction side opposite to a one direction side in the width direction with respect to the proximal end side region in the distal end part body,
• an observation window that is provided at a position closer to a proximal end side of the distal end part body than the treatment tool delivery port in the distal end part body,
• wherein the first illumination window is provided in a proximal end side region at a position shifted from the treatment tool delivery port to the proximal end side of the distal end part body in the distal end part body,
• wherein the first illumination window is disposed closer to the proximal end of the distal end part body than both the treatment tool delivery port and the elevator,
• wherein in a case where a direction perpendicular to both the longitudinal axis and a normal direction of an opening surface of the treatment tool delivery port is a width direction of the treatment tool delivery port, the proximal end side region in which the first illumination window is disposed is a region in the distal end part body, which is located closer to the proximal end side of the distal end part body than the treatment tool delivery port and is present within a range in which the treatment tool delivery port is formed in the width direction,
• wherein a first illumination range of illumination light emitted from the first illumination window includes an observation range of the observation window,
• wherein in a case where a direction perpendicular to both the longitudinal axis and a normal direction of an opening surface of the treatment tool delivery port is a width direction of the treatment tool delivery port, the observation window is provided at a position on one direction side in the width direction with respect to the proximal end side region in the distal end part body,
• wherein the second illumination window illuminates a second illumination range that partially overlaps the first illumination range and includes the observation range.