This article reviews the use of endoscopic retrograde cholangiopancreatography in chronic pancreatitis and discusses the endoscopic and radiologic techniques necessary for good pancreatography, the indications for its use, and the complications that may arise from it. The Cambridge classification is dealt with in detail together with the abnormalities found in chronic pancreatitis. There is also a short section describing methods of endoscopic therapy in chronic pancreatitis.