Forceps device

A forceps device comprising:

• a plurality of grasping portions;
• a support that holds the plurality of grasping portions;
• a first rotating shaft that turnably supports the support;
• a base member that holds the first rotating shaft;
• a plurality of first wires that transmit driving forces to move the plurality of grasping portions;
• a plurality of first guide pulleys arranged coaxially with the first rotating shaft, the plurality of first wires running over the plurality of first guide pulleys, respectively;
• and
• a plurality of second guide pulleys arranged upstream of the plurality of first guide pulleys on a side opposite the plurality of grasping portions, the plurality of first wires running over the plurality of second guide pulleys, respectively;
• and
• a plurality of third guide pulleys arranged upstream of the plurality of second guide pulleys on the side opposite the plurality of grasping portions, the plurality of first wires running over the plurality of third guide pulleys, respectively,
• wherein the plurality of second guide pulleys are:
• shifted toward one side relative to a position immediately below the plurality of first guide pulleys when the first rotating shaft is viewed in front in an axial direction in a state in which a leading end of the plurality of grasping portions points upward;
• and
• arranged so that a plurality of winding angles γ of the plurality of first wires respective around the plurality of first guide pulleys are 65° or larger at a neutral position at which the support is not turned to left or right.