A detector-equipped treatment tool including: a distal-end treatment portion that applies a force to and treats biological tissue； a proximal-end portion that supports the distal-end treatment portion so as to be relatively movable； a detector that is disposed in a cavity provided inside of the distal-end treatment portion and detects the force； wiring that is connected to the detector； and a duct that is connected to the distal-end treatment portion and guides the wiring led out of the distal-end treatment portion from the detector in the cavity to the proximal-end portion.
