Every even-numbered year, ECCAI, jointly with one of the member associations of ECCAI, organizes a European Conference on AI. This conference, abbreviated ECAI, has become the leading conference for this field in Europe. The list of ECAI proceedings is available here.

In retrospect, the first ECAI meetings were considered to have been the AISB conferences: Brighton (1974), Edinburgh (1976), Hamburg (1978), Amsterdam (1980). Conferences using the name ECAI have been held in Orsay (1982), Pisa (1984), Brighton (1986), Munich (1988), Stockholm (1990), Vienna (1992), and Amsterdam (1994).
In 1996, NJSZT, the Hungarian AI Society, organized ECAI-96, which was held in Budapest. In 1998, SSAISB, one of the two British member associations, organized ECAI-98, which was held in Brighton. ECAI-2000 took place in Berlin, Germany on 20-25 August 2000, hosted by GI/KI. On 21-26 July 2002 AFIA hosted ECAI-2002 in Lyon, France. ECAI-2004 took place in Valencia, Spain on 22-27 August 2004. It was hosted by AEPIA and ACIA. ECAI-2006 took place in Riva del Garda (Trentino), Italy. It was hosted by AI*IA and organized by ITC, Trento, Italy. ECAI-2008 took place in Patras, Greece. It was hosted by EETN and organized by the University of Patras.

The 19th biennial European Conference on Artificial Intelligence ECAI-2010 will take place in Lisbon, Portugal. It is hosted by APPIA and organized by the University of Lisbon.

ECAI-2012 will take place in Montpellier, France, hosted by AFIA.