In previous study, we measured the dynamic surface tension using droplet on the vibrating plate. As the apparent gravity changes, the droplet deformation is occurred locally, which results in the increase and decrease of the local surface area. However, the dynamic surface tension gradient along the droplet surface under vibration has not been fully understood. Therefore, we studied the droplet internal flow by numerical and experimental analysis. When the surface tension gradient is imposed along the droplet surface, the internal flow of droplet was generated due to the Marangoni effect along the droplet surface. From experimental point of view, we observed movements of the tracers per period at the highest and the lowest position, respectively. The displacements of the tracers were very small. We concluded that the dynamic surface tension on the droplet surface in the vibrating condition may be almost uniform.