This paper describes a development of Hybrid III AF05%ile dummy FE model by reverses engineering. Better fidelities of the FE models of Anthropomorphic Test Dummy (ATD) are regarded to depend on more accurate geometry, material properties and joint stiffness of the FE models of the ATDs. In this research, geometries of Hybrid III AF05%ile dummy were measured using X-ray CT scans. Material properties of components of the dummy were measured by static and dynamic coupon tests. Joint stiffness of the dummy was measured by tests. An FE model of Hybrid III AF05%ile dummy was generated from scratch by referring these geometries, material properties and joint stiffness. Sled impact test simulation was conducted by the FE model. Kinematics and injury index values by the FE model indicated good correlations with those of sled impact test.