Numerical Human Body Models are constantly evolving, as the development of computing power opens up improved possibilities for computational analysis based on the finite element method. Such models are used to assess the risk of various injuries that may result from sports or traffic accidents. In the master's thesis, we present the process of creating numerical models of knee structures that are most stressed and are in sliding contact with each other during the movement of the knee joint. Based on test simulations, the type and optimal finite element size for the cartilage and meniscus model is determined. We found that from the set of contacts in LS-Dyna, the contact *CONTACT_SURFACE_TO_SURFACE turns out to be the most suitable type of contact between both cartilages and cartilage and meniscus. A simplified numerical model of the knee joint is capable of performing knee flexion from 0 to 90° over a time period of 25 ms, which means that it is useful for short-term load analyzes.