ENThe article analyses the constitutional norm on gender equality referred to in the Constitution of the Republic of Poland of 1997 and the Constitution of the Republic of Lithuania (Lietuvos Respublikos Konstitucija) of 1992. The author tries to answer the question of how the principle of gender equality is enshrined in the two most important normative acts for both countries, which have the highest legal force in the system of legal sources. The scope of research interests therefore includes the issue of constitutional regulations and their impact on the participation of women in the governments of both surveyed countries, their national parliaments, and the European Parliament. The current democratic deficit can be viewed from the point of view of underrepresentation of women in political structures. The participation of women increases the legitimacy of democratic institutions and contributes to reducing gender inequalities in public life. Building awareness of the role of public institutions in the field of equal opportunities regardless of gender corresponds to the principle of social justice, according to which women and men should have equal access to high offices, including the national and European parliaments. Equality and justice are the core values and essence of democracy. A feature of particular importance is gender equality. A reliable basis for defining it is provided by the constitution, therefore the article presents how its provisions may have an impact on women’s participation in the political sphere. Keywords: constitution, the principle of gender equality, political participation of women, underrepresentation, government, parliament. [From the publication]