The project Joint Bodies in Bilateral Agreements (JBinBA) will put a spotlight on joint bodies (JBs), which refers to common institutions set up between the EU and third countries through their bilateral agreements. JBs bring together representatives from the EU (Commission and/or Council) and third countries to oversee the implementation of agreements. Beyond the ability to discuss problems and issue recommendations, JBs are sometimes empowered to amend parts of the agreement or adopt decisions that are binding on the parties, which raises concerns about their democratic legitimacy. Even though the number of JBs run into the hundreds and their decision-making powers attract increasing attention, we have scant knowledge about what explains why they are included in some international agreements but not others and what they do once becoming operational. This project has the ambition to make a significant contribution to our understanding of these bodies and uncover their influence on world politics.