A very long rubbing roller with a small deflection is required the manufacture of large LCD thin films. In order to accomplish this, the shaft for the roller is often made with a composite material. As composite material shafts are expensive and require a long time to manufacture, a simulation to check the deflection of the shaft should be conducted during the design step. However, simulations of extremely long composite materials are seldom reported. Thus, an accurate simulation technique should be studied. Therefore, this report presents the static and dynamic simulations of a very long composite material shaft. The simulation was in good agreement with the test data; hence, the simulation technique can help model other composite material shafts.