When searching for the appropriate polymeric material for the desired finished product, we often decide to pre-test it. Usually, we test only some samples of the material, which rises the doubt about the impact of their geometry and used processing technology on specific material properties. We know that material properties are strongly dependent on its structural morphology, which is formed during the manufacture process of the sample. In this thesis, we examined the influence of the structural features of a semi-crystalline polymeric material on its tribological properties. For this purpose, we tested various samples of the POM material (extruded and two types of injection moulded samples) at the pin-on-disc tribometer. We compared measured contact temperatures, friction coefficients, wear rates and wear mechanisms. We found that the structural morphology of samples significantly influences the wear rate (the difference between the samples is greater than 150 %), but not the coefficient of friction and the contact temperature (the difference between the samples is only about 10 %). Furthermore, we discovered that the contact temperature is mainly dependent on the dimension of the sample.