Endoscope

An endoscope comprising:

• a distal end part body that is provided on a distal end side of an insertion part;
• 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;
• an observation window that is provided at a position closer to a proximal end of the insertion part than a rotational shaft of the elevator in a direction of a longitudinal axis of the insertion part;
• and
• a first illumination window that is provided at a position closer to the proximal end of the insertion part than the rotational shaft in the direction of the longitudinal axis, wherein
• the distal end part body comprises a first inclined surface facing an observation axis which is normal to the first inclined surface and having the observation window disposed on the first inclined surface as the observation axis extends from the observation window in a normal direction, and the distal end body further comprises a second inclined surface facing a first illumination axis which is normal to the second inclined surface and having the first illumination window disposed on the second inclined surface as the first illumination axis extends from the first illumination window in a normal direction, and the distal end body further comprises a second inclined surface facing a first illumination axis which is normal to the second inclined surface and having the first illumination window disposed on the second inclined surface as the first illumination axis extends from the first illumination window in a normal direction, and the first inclined surface and the second inclined surface have different inclination angles,
• the first illumination window, the elevator, and the observation window are positioned in this order in a latitudinal direction perpendicular to both the direction of the longitudinal axis and a normal direction of an opening surface of the treatment tool delivery port,
• a first illumination axis angle is smaller than an observation axis angle from a perspective of the latitudinal direction, the first illumination axis angle is between the first illumination axis and a reference axis from a perspective of the latitudinal direction, the reference axis is parallel to the longitudinal direction, the observation axis angle is between the observation axis and the reference axis from the perspective of the latitudinal direction, and the first illumination axis and the observation axis are on opposite sides of the distal end part body in the latitudinal direction with the elevator located in between the first illumination axis and the observation axis, and
• the observation axis angle and the first illumination axis angle are more than 0 degree inclined relative to the reference axis.