A permanent seat in ECCO's general assembly is occupied by a representative of EFCCA, the European IBD patient association (European Federation of Crohn's and Colitis Associations). In addition, ECCO is establishing cooperation with 'international organization for inflammatory bowel diseases' IOIBD, a worldwide group of IBD experts. One of the first joint projects is a scientific paper on 'endpoints for clinical trials in ulcerative colitis', expected to appear in 2006.

For more than 3 years now, a member of ECCO's scientific committee is part of the scientific committee of UEGW, which designs the program of the UEGW. The program is now characterized by a strong presence of IBD lectures and fora. In addition, ECCO holds a seat in the governing board of UEGF as an 'associate member'.