Jarosław Kaczynski is currently the most important person in Polish politics. Thus, establishing the politician’s real opinion regarding the functioning of Poland within the structures of the European Union is of utmost importance. The aim of the present article is to analyse changes in how Jarosław Kaczynski spoke out on the matter of the UE, between and during the European Parliament Election campaigns. The research focuses also on the politician’s attitude towards the UE. As a result of the analysis, the following conclusion has been drawn: Jarosław Kaczynski’s beliefs about the UE have undergone numerous changes over the course of the years. However, he predominantly tends to perceive European integration as a negative process, while simultaneously endorsing the current that strengthens the feeling of national identity.