To provide a projecting and setting type treatment tool for an endoscope capable of keeping the state that a distal end treatment piece is surely housed inside a flexible sheath in the case of insertion to the treatment tool insertion channel of the endoscope and surely holding the projecting length of the distal end treatment piece from the distal end of the flexible sheath at a prescribed length at the time of use further.

At least a part near the distal end of the flexible sheath 1 is formed of a flexible tube, a wide part 3c for pushing the flexible tube wide in a radial direction in the shape of being spread in the radial direction of the flexible tube is formed near the base part of the distal end treatment piece 3, and an expansion part 5 to which the wide part 3c of the distal end treatment piece 3 is fitted is formed at a part formed of the flexible tube near the distal end of the flexible sheath 1.