A treatment tool includes a sheath, a first grasping member, a second grasping member and a swing member. The first grasping member protrudes from a distal portion of the sheath. The second grasping member is rotatably provided to the sheath so that a first angle, which is an angle formed with the first grasping member, changes. The swing member is provided to the second grasping member so as to swing and so that a second angle, which is an angle formed with the second grasping member, changes. When the second angle is at its maximum, there is a first angle at which the first grasping member and the swing member do not contact each other.
