Lubrication by an extremely thin liquid film has become very important in micro machines, magnetic storage devices and so on. When the thickness of lubricant film is thinned to several nanometers, conventional theories of lubrication cannot be used any more. Molecular dynamics simulation was carried out in the present study to investigate the characteristics of the thin lubricant film confined between solid walls. The model used in this simulation is composed of two solid walls and fluorocarbon polymer lubricant confined between them. One of the walls is moving at constant velocity to shear the film. As a result, the lubricant film forms the adsorbed layers near thewalls and the quasi-fluid layer between them. Under a high shear velocity, the slip occuers between the adsorbed layer and the wall and between the adsorbed layer and the quasi-fluid layer. The orientation of molecule influences the occurrence of this slip.