The article states that the political party system formed on the constitutional basis of the Basic Law of Germany is one of the key pillars of democracy of the German state. The Western German-style political party system, based on a substantial legal framework, political culture, and traditions, has convincingly proved its democratic spirit and viability over several decades of the post-war period. The effectiveness of this system was ensured by the presence of the two large parties, the Christian Democrats and the Social Democrats. The attractiveness of their policy priorities, broad political activity, and statist approaches made it possible to displace other, less influential, parties. The effectiveness and viability of the political party system of Germany are also proven by the course of the process of restoring the country’s state unity. The current period is characterised by systemic crisis phenomena, which have not spared German major parties. These processes are also taking place in other European countries, as previously stable parties transform over time into an idiosyncratic kind of political and technological institutions. For them, short-term success is a priority and is defined by the number of votes cast, rather than the focus on robust principles and visions of the future. However, it may be fair to claim that the whole previous experience testifies to the creativity of the political party system of post-war Germany, thus making the modern Federal Republic of Germany able to cope with contemporary problems and challenges. This is – and will be – buttressed by time and new approaches pursued by politicians, experts, and scholars as well as the previous practice of reaching compromises and social concord in the name of national interests. The political party system was and remains an important constituent of the entire state and political system of Germany. Keywords: political party system, Federal Republic of Germany, state system, Germany, Christian Democrats, Social Democrats.