By suppressing the twisting of the blood vessel that occurs at the time of suturing, the blood vessel can be easily and reliably anastomosed even when the blood vessel is short and cannot be easily inverted 180 degrees. A clamp (2) that clamps a blood vessel, an annular ring member (3) that is connected to the clamp (2) and that is partially cut away in the circumferential direction, and supports the ring member (3) so as to be rotatable in the circumferential direction. Two support tables (4) are provided. Both support bases (4) are connected to each other via a support base connecting means (17) so as to be close to and away from each other. The posture holding means (19) stops the rotation of the ring member (3) at a desired position and maintains the stopped posture.縫合時に生じる血管の捩じれを抑制し、血管が短い場合など容易に１８０度反転できない場合であっても、血管を容易に、且つ確実に吻合できるようにする。 血管を挟持するクランプ(２)と、クランプ(２)に接続され周方向の一部を切り欠いた環状のリング部材(３)と、リング部材(３)を周方向へ回動自在に支持する支持台(４)とをそれぞれ２つずつ備える。両支持台(４)は支持台連結手段(17)を介して互いに近接・離隔可能に連結してある。姿勢保持手段(19)はリング部材(３)の回動を所望の位置で停止してその停止姿勢を維持する。
