This paper describes an investigation about the possibility of producing a fiber-reinforced plastic gear which is light, self-lubricated and of high strength, by taking advantage of the characteristics of the unidirectionally reinforced lamina. A fiber-reinforced plastic spur gear was molded by arranging long carbon fibers along the tooth shapes and then filling up inside with composite of glass fiber chops and epoxy resin. Bending strength of the tooth of the gear was studied experimentally and analytically. Availability of the fiber-reinforced plastic gear thus made was confirmed by the investigation.