This article is focused on height adjustment of a front car seat. The goal of the article is to design seat movement in pure vertical direction. The article begins with a theoretical introduction, in which the functions and parts of car seats are described. The next part contains possible schematic designs of a mechanism, as well as reasons for possible changes of contemporary mechanisms. Afterwards, some functional parameters of the chosen schematically-designed mechanism are calculated, the results could then be used for further calculations needed for creation of a three-dimensional model of the mechanism. The article deals mainly with the theoretical principles, and there are many further development possibilities in the area of article’s subject.