Human tissues and organs often exhibit rheological behaviors during their deformation. For surgery simulation and human modeling, we have to identify physical parameters of such deformation in advance. In this paper, we propose an approach to estimate the physical parameters of uniform rheological deformation based on 2D/3D finite element (FE) modelsimul ation. At first, the FE dynamic model was described and simulations were conducted with initial parameters. Then, the identification method was proposed according to analysis of deformation behavior. Finally, identification results were shown and their validity was evaluated by comparing identified parameters and initial ones. This method can be extended to visco-elastic and layered rheological deformation.