Provided is a high-frequency treatment tool. A positioning member (14) that regulates movement of a second wire part (16e) within a sheath (12) relative to a first wire part (16b) in a direction of a longitudinal axis of the second wire part (16e) is present in the sheath (12). In a state in which a folded part (16d) is located close to a distal end of the sheath (12), a loop formation part (16c) is fed from the distal end of the sheath (12) with the second wire part (16e) fixed.
