An endoscope insertion portion of this invention includes: a distal end portion disposed at a distal end part a bending portion bendable in a first direction, which is provided in a linked manner on a proximal end side of the distal end portion a first observation optical system for making light from a subject incident on a first image pickup portion, which is provided in the distal end portion the second observation optical system for making light from the subject incident on a second image pickup portion, which is disposed in the distal end portion and an air/water feeding portion for spouting gas or liquid from a spouting port to outer surfaces of the first observation optical system and the second observation optical system, which is disposed on the distal end portion so as to line up with the first observation optical system and the second observation optical system on a generally straight line. The air/water feeding portion is disposed on the distal end portion such that a spouting direction of the gas or the liquid has a first angle with respect to the first direction. Accordingly, it is possible to ensure observation field of view of the respective observation optical systems by efficiently cleaning filth and the like adhered on the outer surface of the observation optical systems using single air/water feeding portion.
