To provide a blood vessel knife allowing a doctor to easily look a knife main body even when he has the blood vessel knife by his hand and easily prevented from thrusting through a lower side blood vessel wall 15b even in a beating state of the heart.

In the blood vessel knife 1 constituted by providing an edge tool holder 3 to the distal end of a rod-shaped grip part 2 and providing the knife main body 4 to the distal end of the edge tool holder 3, a bent part 3a is formed to the grip part 2 or the edge tool holder 3. When the grip part 2 of the blood vessel knife 1 is held by the hand, the knife main body 4 provided behind the gripping hand becomes easy to look because the bent part 3a is provided. Since there is the bent part 3a, the knife main body does not thrust through a blood vessel 15 and thrusts in the blood vessel obliquely. Therefore, the blood vessel knife is hard to thrust through the lower blood vessel wall 15b.