Provided are an endoscope insertion portion and an endoscope in which a merging member does not hinder the operation of a bendable portion. A bendable portion and a flexible portion are joined together with a proximal end piece and a coupling ring. A merging member has branch pipe portions and a merging pipe portion. The branch pipe portions are constituted by a proximal end of the merging member branched out into two. A gas supply tube and a liquid supply tube communicate with the branch pipe portions. The merging pipe portion is provided continuously with distal end sides of the branch pipe portions, and communicates with a gas/liquid supply tube. The gas/liquid supply tube has a length such that the merging pipe portion stays within the coupling ring when the merging member is pulled in by the bending of the bendable portion.
