The chapter deals with the EU’s engagement with two key development bodies of the UN: the United Nations Conference on Trade and Development (UNCTAD) and the United Nations Development Programme (UNDP). The approach is twofold. First, the chapter explains the modes of cooperation of the EU and its Member States in these two organizations. It finds that in both instances the EU and/or Member State actors’ choice to become involved depends on the issues at stake and is highly pragmatic. Issues of competence arise rarely, as both bodies function in the area of development – a shared competence of the Union and the Member States. Second, the chapter analyses the influence that the EU has had on UNCTAD and UNDP, and vice versa. In this regard it is found that UNDP appears as a closer partner to the EU, whereas EU actors feel less ownership over UNCTAD. However, both bodies have an important role to play in the EU’s development policy.