The purpose of the discussion is to show the contribution of the Primate of Poland Card. Stefan Wyszyński and Pope John Paul II in the process of normalisation relations between the State and the Catholic Church in Poland after World War II. The whole covers three issues. The first concerns changes that were introduced by the communist authorities. The resolution of the Provisional Government of National Unity declaring that the “Polish Concordat of 1925 ceased to be in force” was of significant importance. This meant a transition from the regulation of relations between the State and the Church in the form of a bilateral international agreement to regulation in the form of acts unilaterally adopted by the state authorities, drastically restricting the freedom of the Church in carrying out its mission. The second issue concerns the principles and methods that Primate Stefan Wyszyński and Pope John Paul II used and postulated to achieve the normalization of diplomatic relations between Poland and the Holy See and the regulation of relations between the State and the Church of Poland in the form of a bilateral international agreement. The third issue concerns the subsequent stages of implementation of these demands – from the breaking of the Concordat of 1925 to the conclusion of a new Concordat in 1993-1998.