A living-body tissue removing apparatus according to the present invention includes a grip portion, an inserting portion which is connected to the grip portion and is inserted in the body, an endoscope inserting channel which is arranged in the inserting portion and in which an endoscope is inserted, and a blood vessel keeping member which is arranged in the inserting portion and which is movable back and forth in the axial direction of the inserting portion. The blood vessel keeping member includes a blood vessel keeping bed which keeps the blood vessel and a locking member which accommodates therein the blood vessel in closed space when the blood vessel keeping member keeps the blood vessel on the blood vessel keeping bed.