To provide a retractor that can reduce the occurrence of sparks in the surgical field due to inadvertent contact between the deployed retractor and other surgical devices (for example, an electronic scalpel), and can reduce the mental and physical burden on the operator and the patient. thing. The present invention relates to a retractor for excluding an inner wall of a hollow organ or an organ in a body cavity, a storage tube, a deployment body that can be accommodated and extended with respect to the storage tube, the storage tube, and the deployment body Each of which has a grip connected to its proximal end. The deployable body includes a movable wire and an excluding portion composed of a plurality of fixed wires arranged around the movable wire； and an introduction pipe extending through the extruding portion and penetrating the movable wire. Further, the design is such that one deployment angle θ2 is larger than the remaining deployment angle θ1 among the deployment angles formed between the two adjacent fixed wires in the exclusion portion when the deployment body is deployed. Has been.展開したリトラクタとその他の手術デバイス（例えば、電子メス）との不用意な接触による術野でのスパーク発生を低減し、術者および患者の精神的かつ肉体的負担を軽減し得るリトラクタを提供すること。本発明は、管腔臓器の内壁または体腔内の臓器を圧排するためのリトラクタであって、収納管と、該収納管に対し、収容かつ延出可能な展開体と該収納管および該展開体のそれぞれ近位端と接続されたグリップとを備える。展開体は可動ワイヤおよび可動ワイヤの周囲に配置された複数本の固定ワイヤから構成される圧排部；および圧排部に延設されており、かつ該可動ワイヤが貫通する導入管；を備える。さらに、展開体が展開された際の圧排部における、隣接する２つの該固定ワイヤの間で形成される展開角度のうち、１つの展開角度θ２が残りの展開角度θ１よりも大きくなるように設計されている。
