A simpler combined drainage operation for a patient with chronic pancreatitis and chronic pseudocyst is described in the following conditions: the pancreatic duct was markedly dilated, the cyst was located directly behind the main pancreatic duct in the head of the pancreas and separate from the duodenum and the cyst caused persistent CBD stricture and cholestasis mainly by its compressive effect. The pancreatic duct was opened anteriorly throughout its length. A second incision was made in the posterior wall of the main pancreatic duct into the cyst and the edge of the opening was sutured for hemostasis. The opened pancreas was anastomosed to a Roux-en-Y jejunal limb according to the ordinary method of longitudinal pancreaticojejunostomy. This technique, cystopancreaticostomy and pancreaticojejunostomy, may provide a simpler and effective operative strategy for patients with chronic pancreatitis and pseudocyst in similar conditions.