Our experience with the ERCP is based on the results obtained in 140 cases. This method has brought important advances for the diagnosis of biliary and pancreatic affection and is indispensable for the exact differential diagnosis of obstructive jaundice, diagnosis of the stenosis of the papilla Vateri, the chronic pancreatitis and pancreas cysts. Regarding the necessary precautions, this method is associated with low risk in skilled hands in relation ot its informational value.