Patent ID: 7824342

Claim:
A tissue cutting device comprising: an insertion section which is inserted inside a specimen and extends from a distal end to a proximal end; openings which are formed in a row along an outer peripheral face of a distal end side of the insertion section inserted into the specimen, wherein the row extends from the distal end towards the proximal end; tissue cutting members, each of the tissue cutting members passing through a respective one of the openings, each of the tissue cutting members extending such as to protrude in a direction intersecting, at an angle, an axial line of a length direction, the axial line extending from the distal end of the insertion section to the proximal end, and each of the tissue cutting members being drawn into the insertion section from the respective one of the openings after forming loops which tissue can be inserted into, each loop being formed by a single one of the tissue cutting members; a control member which is connected to the tissue cutting members; and a controller for controlling the control member; wherein each of the tissue cutting members is protruded from and drawn into the insertion section through a same one of the openings, and wherein tissue passed into the loops is cut by controlling the control member and drawing the tissue cutting members from the openings completely into the insertion section such that an entirety of each of the tissue cutting members is retracted inside the insertion section.