The need to understand the functioning of the human body in its systems and structures entails studies of several areas, not being restricted to the medical field. Movements and body support, which could may appear simplicity, involve a high level of complexity and iteration between skeleton, muscles, nerve impulses, and other tissues. The occurrence of tendon rupture, bone fracture or any accident that prevents or encumber basic body movements, impact patient s life. In order to provide more comfort and quality of life, bone and prosthesis studies seek to replace or repair locally anomalies that would restrict the patient. The femur is one of the main and longest bones of the human skeleton, which will be the focus of this project. This work intends to understand the femur s forces and functions, femoral prostheses most used in the market, and, from these concepts, propose and demonstrate that a new geometry is possible. The proposed geometry will be based on a human femoral CAD model, using topological optimization concepts, with the help of ANSYS 18.1. Finally, validate that the new optimized structure is able to withstand the main forces acting normally on the femur.