The master thesis deals with the topology optimization method on the practical example of train seat support. Topology optimization was performed using the computer program "Altair Inspire". The paper considers the use of additive manufacturing for the purpose of realizing a complex structure obtained by topology optimization. After the introduction, the second chapter of the paper describes the process of additive manufacturing, compares it with subtractive manufacturing, and mentions the connection between additive manufacturing and topology optimization. The third chapter of the paper describes in detail the meaning, process and use of topology optimization. It includes the mathematical background, types of optimizations, computer programs, and a number of advantages that topology optimization can offer in the transportation industry. In the fourth chapter, additive manufacturing and topology optimization are connected, the working principle is described in steps and what behaviour the material has when processed by additive manufacturing procedures. In the fifth chapter, the process of topology optimization is shown and explained on the practical example of topology optimization of seat supports. In the sixth chapter, there is a detailed presentation of the results obtained by topology optimization in the "Altair Inspire" computer program.