A forceps tool for an endoscope is provided with a tube member, a support member secured to a distal end of the tube member, a support pin provided to the support member, a pair of forceps rotatably supported by the support pin, the pair of forceps being rotated about the support pin, a cam groove being formed on each of the pair of forceps, a movable member configured to axially move inside the tube in an axial direction thereof, an insertion hole formed on the movable member, a cam pin inserted through the insertion hole, both ends of the cam pin engaging with the cam grooves, respectively. The pair of forceps rotates about the support pin in accordance with engagement of the cam pin with the cam grooves as the movable member moves in the axial direction, and the cam pin is rotatably supported by the insertion hole.
