What is the principal role of the European External Action Service (EEAS) in EU cybersecurity and how does its influence in this crossover area of EU policies unfold? To answer these questions, the major cybersecurity documents, its actors and the EU competence in the field of cybersecurity will be reviewed. The article will then examine the role of the EEAS in the specific sub-area of EU cyber defence. It argues that the principal role of the EEAS is to bring more coherence and coordination to cybersecurity, especially in the area of cyber defence. Due to wellestablished procedures and strong institutional involvement supported by other bodies, the EEAS has entrenched its role in cybersecurity policies, even if it still remains a solely supportive one.