We presented six cases of choledochal cysts all of whichwere diagnosed by ERCP. Patients were 12,13,17,20,29 and 36 years old. Five were female and one was a male. The main symptom was abdominal pain.The Endoscopic Retrograde Cholangiopancreatography showed the anatomic details of the biliary tree and the pancreaticobiliary ductal junction and also allowed us to decide the adecuate management of the patient.