This work dealt with the trans-tibial prosthesis with Sure-Flex™ foot. In the FEA, a prosthetic socket was not included. Because of the complexity, this study was divided into several phases as shown in Fig. 1. For the assessment of the prosthesis geometric configuration and the load acting on the prosthesis, the foot analysis of an amputee, including ground reaction force (GRF) measurement, motion analysis and strain gauge analysis, was done. The geometry model was created on the basis of information extracted with reverse engineering techniques. For determining the material characteristics of the prosthetic foot components, non-destructive tests and their FE simulations were conducted. In the final phase, the FEA was accomplished and stress and strain distributions were obtained. Agreement between the numerical and the experimental models was assessed by comparison of the FEA and the strain gauges analysis results.