The European Civil Aviation Conference (ECAC) is an international organisation of States which was formed with the assistance and involvement of International Civil Aviation Organisation (ICAO) and held its inaugural session in Strasbourg in 1955. The 18 Founder Members have since been joined by many others and now total 44. The Conference has working relationships with other key European organisations which have aviation sector interests and responsibilities including European Aviation Safety Agency (EASA) and EUROCONTROL.
ECAC was founded to "promote the continued development of a safe, efficient and sustainable European air transport system by harmonising civil aviation policies and practices amongst its Member States and promoting understanding on policy matters between its Member States and other parts of the world".