The article highlights the formation of Slovakia’s highest representative bodies from the mid-19th century to the second half of the 20th century. The article then goes on to describe the process of drafting the Constitution of the Slovak Republic of 1 September 1992 and the importance of the fundamental structure of the parliament and the reasons why the authors of the final draft of the constitution, as well as the MPs who adopted it, turned out to be supporters of unicameralism. The main focus of the deliberations is devoted to the proposals to establish a second chamber of the Slovak Parliament, which were put forward mainly between the years 2000 and 2008. The basic solutions contained in the drafts authored by Slovak political parties, individual politicians, non-governmental organisations or governmental documents indicate the fundamental reasons for putting forward such a concept, which, since the establishment of the Slovak Republic in 1993 until present day, has not enjoyed the interest of politicians from both the governing and opposing political parties.