PROBLEM TO BE SOLVED: To provide a spacer member for an endoscope capable of an omnidirectional approach. SOLUTION: The spacer member 2 for an endoscope secures a space for working with the endoscope in a body cavity. It consists of a balloon that expands when a fluid is filled inside, and has a plurality of linear or curved side portions 21a, and both ends of the side portion 21a are joined to the ends of the other side portions 21a, respectively. It has a three-dimensional skeleton member 21 that exhibits a three-dimensional shape in an inflated state, and a fluid introduction portion 22 for filling the three-dimensional skeleton member 21 with fluid. The three-dimensional frame member 21 includes at least three intersided portions 21b surrounded by a plurality of side portions joined to each other among the side portions 21a, and the inner space formed by each side portion 21a is each side portion. It is open to the outside via the intervening portion 21b. [Selection diagram] Fig. 1【課題】全方位的なアプローチが可能な内視鏡用スペーサ部材を提供すること。【解決手段】内視鏡で作業するための空間を体腔内に確保する内視鏡用スペーサ部材２である。内部に流体が充填されることにより膨張するバルーンからなり、複数の直線状または曲線状の辺部２１ａを備え、辺部２１ａの両端部は他の辺部２１ａの端部にそれぞれ接合されて、膨張された状態で立体形状を呈する立体骨組部材２１と、立体骨組部材２１内に流体を充填するための流体導入部２２とを有している。立体骨組部材２１は、各辺部２１ａのうち互いに接合された複数の辺部により囲まれた少なくとも３つの辺部間部分２１ｂを備え、各辺部２１ａにより構成される内側空間は、各辺部間部分２１ｂを介して外側に開放されている。【選択図】図１
