Various numerical analysis techniques have been applied to research and design of rolling bearings. The most important property of rolling bearings is continuing low friction. Stress analysis and oil film analysis are necessary to give the long-term operating life. Approximate models and numerical approaches such as multilevel methods have been developed for highly-efficient computation of the stress and film properties. In order to estimate heat generation and energy loss due to bearing operation, friction analysis is indispensable. The friction force is calculated by considering lubricant viscosity and slip motion of each bearing part. FEM stress analyses are required to improve cage strength and evaluate cage deformation. Recently, there have been attempts to calculate lubricant behavior and interaction between lubricant and bearing parts with the advanced computational fluid dynamic methods. The latest rolling bearings are based on these progressive analysis efforts.