The CCEE collaborates with the Holy See and other episcopal bodies to strengthen the communion among the Bishops of the world who are committed to the ecclesial mission entrusted to them.
- Among the continental episcopal organizations: SECAM-SCEAM in Africa, CELAM in Latin America, FABC in the Asian continent and FCBCO in Oceania;
- The COMECE, ie the Commission of the Bishops' Conferences of the European Community"; that according to its mission as defined in its Statutes, controls the political process of the European Union in all areas of interest for the Church.
- The Permanent Observer of the Holy See to the Council of Europe which follows, on behalf of the Holy See, the work of the Council of Europe, of the European Court of Human Rights. The Permanent Observer is a special interlocutor of the Parliamentary Assembly.
The CCEE is also in contact with UCESM (European Union of Major Superiors) and other Catholic bodies, especially those related to the Bishops' Conferences, among which for example: Caritas Europa; Justice and Peace Europe; the ICMC (the International Catholic Commission for Migration) and the CEEC (the European Commission for the Catholic School).