PURPOSE: A structure for blood vessel anastomosis using a self expandable material or structure and a blood vessel anastomosis method using the same are provided to perform blood vessel anastomosis operation more easily, by fixing blood vessel by expanding the blood vessel anastomosis structure by applying an external constant stimulus. CONSTITUTION: An injection nozzle(9) is arranged to be located in the outside of a blood vessel. A pair of elastic members(10, 10) are extended from one side of the injection nozzle. The pair of elastic member is located in the diameter of the blood vessel between both ends of the cut blood vessel. The elastic member is filled with materials(11, 11) having expansibility. Both ends of the blood vessel are sutured using prolene as suture thread.본 발명은 자가 팽창성을 가지는 물질 또는 구조를 이용한 혈관 문합용 구조물 및 이를 이용한 혈관 문합 방법에 관한 것으로, 더욱 상세하게는 외부의 자극에 의해 자가 팽창성을 가지며 시술 후 제거가 가능한 물질 또는 구조를 이용한 일정 형태의 혈관 문합용 구조물 및 이를 이용한 혈관 문합 방법에 관한 것이다.