ENThe article analyses the reasons of the coup d'etat of 1432 in the Grand Duchy of Lithuania (GDL), which led to the outbreak of civil war between Grand Duke Zygmunt Kiejstutowicz and his overthrown predecessor Swidrygiełło Olgierdowicz. The author demonstrates that Świdrygiełło's religious policy, despite the traditional opinion accepted in the Russian historiography, was not the reason for this coup d'etat. Having analyzed the body of sources, the author concludes that a part of Grand Duke's entourage was dissatisfied with Swidrygiełło's consistent policy aimed at the severance of the Polish-Lithuanian Commonwealth. Such policy was one of the ways of solving the problems of GDL-Polish relations, which were on the agenda of GDL political life since late 1420s.