A tissue grasping tool includes a first opening-closing member and second opening-closing member that are capable of opening and closing each other, a first loop section configured to form a first loop by a first wire-shaped member protruding from the first opening-closing member and having a push-down surface formed at a distal end portion thereof to push tissue down, and a second loop section configured to form a second loop by a second wire-shaped member protruding from the second opening-closing member and having a push-up surface formed at a distal end portion thereof to push tissue up. The push-up surface of the second loop section is disposed at a position more proximal than the push-down surface of the first loop section. The distance between the push-down surface of the first loop section and the push-up surface of the second loop section is increased according to an operation in which the first opening-closing member and the second opening-closing member are closed.
