A tissue grasping tool includes: a longitudinal-axis member a first member and second member a manipulation member a first wire-shaped member protruding from the first member and being formed a first loop and a second wire-shaped member protruding from the second member and being formed a second loop the first wire-shaped member and the second wire-shaped member extend in a direction which gradually approaches with each other as it goes toward the distal side from a proximal side of the first and second loops in a state of which the first member and the second member come close with each other, the second wire-shaped member passes through an inside of the first loop and a distance between distal end portions of the first and second loops is increased according to an operation in which the first member and the second member approach.
