Though the rolling ball bearing greatly contributes to decrease the friction energy of the machine movement, we require the development of lower friction torque technology of ball bearing to achieve more efficient machine. Especially, the fluid resistance makes an important role when the ball bearing is soaked in lubricant. Estimation of the loss of torque by the fluid resistance brings the reduction in the design cost. Therefore, in our research, it aims to develop the simulation technology of the fluid resistance by the ALE (Arbitrary Lagrangian and Eulerian) Finite Element Method. As the first step, we have established the simulation technology of movement analysis for the only ball bearing. In this report, we did the movement analysis numerical simulation of the ball bearing that considered the contact ellipse and EHL (Elastohydrodynamic Lubrication) Theory. As the result, we improved validity of the analysis from the perspective of the contact reaction force.