In accordance with the objectives and principles of EU external actions as enshrined in the TEU, and from the perspective of ”the EU as a normative power,” this article examines the EU's role in pursuing international criminal justice. This article investigates the evolution of the EU's judicial practices and home affairs, and police and judicial cooperation in criminal matters. This article then traces the EU's contributions to the effective functioning of the ICTY and ICTR, and the universality and integrity of the ICC. It then explores the EU's response to US efforts to conclude non-surrender agreements with third countries. This article concludes that the EU has played a significant role in establishing international criminal justice systems, which underlines the importance of the objectives and principles guiding the EU's external actions and strengthens the EU's normative image.