A forceps device includes a grasp portion, an operation portion equipped with a sliding portion and a rotation operation portion, an inner cable, an outer casing, a grip portion to be held when operating the operation portion, and a resin-coated portion. The proximal end side of the inner cable is mounted to the sliding portion and the distal end side is connected to the grasp portion. The proximal end side of the outer casing is mounted non-rotatably to the rotation operation portion and the distal end side is engaged rotatably with respect to the resin-coated portion and immovably in an axial direction with respect to the resin-coated portion. The sliding portion is mounted non-rotatably and slidably relative to the rotation operation portion. The rotation operation portion is rotatably connected to the grip portion and is provided at a proximal end side of the grip portion.
