Abstract: An ultrasonic endoscope includes a radial type ultrasound transducer in a distal end part of an insertion part, in which a distal end surface of the distal end part includes, when viewed from a direction perpendicular to the distal end surface, a center surface portion positioned on a center side of the distal end surface, and an annular outer peripheral surface portion positioned outside the center surface portion, an observation window, an illumination window, a forceps port, and a nozzle are provided in the center surface portion, the outer peripheral surface portion is a dead space of the distal end surface caused by the ultrasound transducer, and in a case where a longitudinal axis direction of the insertion part is defined as a height direction on the distal end surface, at least part of region of the outer peripheral surface portion has a height different from the center surface portion.

Abstract: A screw for fixing a frame which is an internal constituent member and a screw for fixing a bendable portion constituent member are disposed at positions different from each other in a peripheral direction, and the screws are disposed close to each other in a longitudinal axis direction relative to a case where the screws are disposed at the same position in the peripheral direction and are disposed at positions where a distance in the longitudinal axis direction between the screws is shortest.