Résumé : This final dissertation is about the study of the Visegrád Group and its influence on the New Pact on Migration and Asylum, initiated by the European Commission on 23 September 2020. As a matter of fact, in recent years, the European Union has seen millions of refugees and irregular migrants arrive at its borders. With the geopolitical instability in the Middle East, the authoritarian hardening of some African countries and the poverty of these regions, many migrants have chosen another life. However, the European migration system has been overwhelmed by the scale of this exodus and the migration crisis has very quickly turned into a humanitarian crisis. This is why, as early as 2015, the Commission undertook to reform and standardise the Common European Asylum System. Initially, this overhaul of the system was geared towards measures that were essentially solidarity-based, inclusive and humanitarian. However, the nationalist opposition of the Visegrád Group quickly became apparent. The latter, perceiving immigration as a threat to Europe's economy, culture and security, set out to influence the Commission and advocated the implementation of other more restrictive and security-related measures. Surfing on the context of the EU's deficit, the V4 succeeded in imposing some of its prescriptions. For example, the intergovernmental political manoeuvring of the Visegrád Alliance led to a tightening of the New Pact on Migration and Asylum.