Nowadays, innovations in lower limb prosthetic head towards active prostheses development or cheaper prostheses affordable by a wider group of people. Evaluation and optimization of prostheses’ passive com-ponents, like the foot component of a lower limb prosthesis, could be useful to improve prosthesized sub-jects’ comfort and prostheses’ physiological response, as well as simplify the role of the active components. This study proposes to utilize multibody analysis to reproduce the elastic behaviour of a commercial pros-thetic foot in order to run a dynamic simulation of gait’s stance phase. The multibody model realization is carried on with different CAD software and completed in MATLAB, while the static and dynamic analysis of the prosthetic foot are performed with Simulink alongside MATLAB itself.