In this paper, some aspects of the interreligious dialogue, which has found its place after the Second Vatican Council withing the framework of the New Evangelisation, are emphasised. Hence, the question arises whether it is only ʺan instrumentʺ in the process of Evangelisation or has its own inherent value. Beginning with the openness of the council towards other religions, which was emphasised very clearly by the Pope Paul VI in his encyclical Ecclesia Suam during the Council itself, this paper analyses further developments, citing examples of theological discussions from various symposia and congress. Interreligious dialogue was also a topic at the Synod of Bishops in 1974, where a kind of restraint was felt again. It was partly overrode already by the Popeʼs post-synodal exhortation Evangelii Nuntiandi, but even more by activities of the Blessed Popes John Paul II, Benedict XVI and Francis, who gave interreligious dialogue new power, both theoretically and practically. The second part of the paper depicts the development of the interreligious dialogue in Slovenia. Before the state independence of our country, it was not very visible. Encouraged by the greater religious freedom after 1991, it made important progress and mainly been realised by championing the same common values regarding legislation, but there have been significantly fewer scientific deliberations and interreligious meetings. It is interresting to observe that the topic of dialogue was weakly represented during the process of the Plenary Council. The religious dialogue in the area of the mutual spreading of knowledge regarding typically religious questions has been even weaker. Therefore, it is exactly this area remains the greatest challenge for the future.