An endoscopic treatment tool comprises an elongated sheath and an elongated portion configured to be inserted in the elongated sheath and capable of being movable back and forth in directions. A loop portion is disposed on a distal end of the elongated portion and is constructed of a wire folded to form into a loop. The loop portion includes a first bent portion, a pair of second bent portions, a pair of third bent portions, and a fourth bent portion all of which are integrally formed from a distal end toward a proximal end of the loop portion. A first length that represents a length from the first bent portion to the fourth bent portion in the directions along the longitudinal axis ranges from one and half times to two times a first width that represents a maximum dimension of the loop portion in directions perpendicular to the longitudinal axis.
