EN
The aim of the article is to examine the extent to which the electorates of the current parliamentary parties (represented in the Sejm of the Republic of Poland) are changing in terms of their place in the electoral space. The paper focuses on the issue of electoral volatility of Polish political parties – the variability of the behaviour of their electorates in territorial terms (constituencies). The presented study allows to confirm the thesis of low electoral volatility (high stability) of the main parliamentary parties in the period 2001–2019, with groupings with high support characterised by a lower level of electoral volatility. In addition, the article presents an analysis of the electorates of groups of political parties over the same period, which allows to confirm the flows of electorates related to the dynamics of the party system.