The purpose of the article is to study the crisis period in the process of establish- ing parliamentary democracy in the Second Polish-Lithuanian Commonwealth in 1924-1926. Research methodology. General scientifi c complex research methods (empirical, comparative, theoretical, analysis method) are applied. In the process of research, the authors were guided by the principles of historicism, objectivism and systematicity, thanks to which the source and historiographical material processed and involved in this scientifi c investigation is reliable and representative. The scientifi c novelty of the article is determined by the fact that the authors have made an attempt to carry out a comprehensive analysis of the positions of the leading Polish political parties towards the current model of parliamentary democracy, as well as their proposals for its reform. Conclusions. Th e article highlights the political debate in the Polish po- litical space regarding overcoming the crisis of parliamentary democracy through the reform of the electoral legislation and the Constitution of 1921. The party debate on issues of state and the legal system of the Second Polish-Lithuanian Commonwealth in 1924–1926. The main propos- als for reforming Polish statehood are characterized. It was found that most of the Polish political parties considered the lack of conditions for the creation of a stable parliamentary majority to be the main problem of the crisis in the country’s public life, which would facilitate the imple- mentation of a consistent and long-term government policy. At the same time, the principle of proportional representation, the practice of which led to the emergence of an unreasonably large number of parliamentary factions, was considered the most important drawback of electoral law. One of the proposed options for overcoming the crisis was a transition to a majoritarian electoral system, which would favor large parties and the creation of a strong parliamentary majority and a government based on it.