A treatment tool (1) for an endoscope includes: an elongate-flexible tube (5) a second forceps piece (8) which is disposed at the tip of the flexible tube (5) a first forceps piece (7) which is disposed at the tip of the flexible tube (5) and which moves so as to open from or close against the second forceps piece (8) and a guide portion (12) which is provided in the second forceps piece (8) so as to protrude forward of the tip of the first forceps piece (7) along with extending in the longitudinal direction of the second forceps piece(8).
