The aim of this study is development of biomechanical model of the thorax by the creation of the new factual model of this part of human’s body through the medium of hexahedral grid. The whole model is based on the Finite element method and it has been generated with respect to the real anatomical human data, since the photographs of Visible Human Project have been used for the determination of the spatial arrangement of individual organs. The material properties and contacts have been implemented into the model for the completion of the spatial arrangement and for the completion of the model. The Kroell test has been applied for the validation of the thoracic model. The thoracic injury criteria can be determined from the results of the Kroell test. These injury criteria play considerable role during the accidents. One of these injury criteria is just chest defíection, which has-been investigated during the Kroell test. The validated model will be utilized for the simulation of the vehicle crash situations and for the observation of motion of thoracic organs during the impact. The created model is of great scientific importance since the model is much closer to the biological reality. and Obsahuje seznam literatury