PROBLEM TO BE SOLVED: To provide an ultrasonic endoscope having an insertion part which includes: an optical observation part and an ultrasonic observation part, and whose distal end is thinner.SOLUTION: The ultrasonic endoscope includes: the insertion part the optical observation part arranged at the distal end of the insertion part an ultrasonic observation part having an ultrasonic probe and a housing for holding the ultrasonic probe, provided so that at least a part of the housing is projected toward the subject side of the optical observation part from the optical observation part and a fluid sending part arranged in the housing so as to send a fluid toward the optical observation part.COPYRIGHT: (C)2010,JPO&INPIT【課題】本発明は、挿入部に光学観察部及び超音波観察部を具備してなる超音波内視鏡であって、より細い挿入部の先端部を有する超音波内視鏡を提供する。【解決手段】本発明の超音波内視鏡は、挿入部と、前記挿入部の先端部に配設された光学観察部と、超音波探触子及び前記超音波探触子を保持するハウジングを有し、前記ハウジングの少なくとも一部が前記光学観察部よりも前記光学観察部の被写体側に突出するように設けられた超音波観察部と、前記光学観察部に向けて流体を送出可能であり、前記ハウジングに配設された流体送出部と、を具備する。【選択図】図2
