PURPOSE: To obtain a lightweight, low-noise, and corrosion-resistant gear or cam that can resist a high load condition by laminating and meltedly forming a compound sheet made up of arranged long-fiber reinforcing materials and short fibers consisting of thermoplastic resins.

CONSTITUTION: Long-fiber reinforcing materials 1 such as carbon fibers and glass fibers are extendedly arranged in one direction to form a sheet shape, and short fibers consisting of thermoplastics such as nylon and polyester are mixedly woven to make a compound sheet. And the compound sheets are laminated and meltedly formed to shape a prescribed gear or cam 2. Thus, a high fracture toughness, a strong fatigue strength, a high working accuracy, and lightweight gear or cam can be manufactured with high productivity.