This treatment tool having: an inserted part that can be inserted and passed through an endoscope, in which a treatment part for carrying out a specific treatment on a tissue is provided to the distal end of the inserted part which is passed through the endoscope and disposed inside the body. The treatment part being provided to the inserted part so as to be freely projecting and retracting and provided with: an operator portion at the base end portion of the inserted part which is pulled out from the endoscope, for manipulating the projection and retraction of the treatment part.
