The Bachelor thesis is focused on possibilities of using computer modeling in risk analysis of selected machine. The aim of the thesis is to construct a machine model – a saw blade and then to simulate an unwanted event in the Tecnomatix Jack. The thesis is divided into two theoretical and practical parts. The first part is focused on the legal assessment of the risks of machinery, as well as the safety requirements of disc saw an examples of the use of virtual reality in the analysis of the risks of machinery. The second part is devoted to the simulation of unwanted events that can occur when working on a saw blade.