The aim of my PhD thesis is to better understand how and why domestic policies become more and more europeanised. More precisely, the question is to identify through which mechanisms the EU is able to affect national eHealth policies in France, Austria and Ireland. EHealth policies refer to a specific healthcare organisation, in which Information and Communication Technologies are incorporated : Electronic Health Records, e-Prescriptions, telemedicine, etc. Since the 1990's, the European Union actively promotes the use of these technologies and the adoption of "eHealth strategies" by member states . Without any formal competence in the healthcare area, the European Commission has no choice but to produce soft incentives, mainly by making available institutionnal, political and financial resources to national actors. The aim of this thesis is to understand how these European instruments affect the domestic policy-making in eHealth. We will therefore use a bottom-up approach, with an anlysis of European resources "usages" by national actors.