To provide a packing material having higher sealing property, lubricating property, and heat radiation property than a conventional packing material.

This packing material formed like a substantially string is composed of a twisted body formed by twisting a laminated body constituted by a bundle of fibers made of a tape made of expansion graphite and opened carbon fibers, a bundle of opened carbon fibers wound in the opposite direction to the direction of twisting of the twisted body for an outer peripheral face of the twisted body, and a fluoroethylene resin layer formed to cover at least the outer peripheral face of the bundle of opened carbon fibers wound around the outer peripheral face of the twisted body.