Patient No. 1 was a 66-year-old male who was diagnosed as having cancer of the caput pancreatis, and underwent percutaneous transhepatic biliary drainage (PTBD). Since the tube slipped out, percutaneous transhepatic gallbladder drainage (PTGBD) was performed. After PTGBD, biliary hemorrhage was observed for two to three days, then hemorrhage disappeared and bile flowed smoothly. Since the tube was likely to slip out, the tube was replaced. After replacement of the tube, biliary hemorrhage was noted for two to three days, then spontaneously subsided again. After icterus was reduced, pancreatoduodenectomy was performed. During surgery, a number of massive blood clots were noted in the bile duct. The PTGBD tube was removed, and a transjejunal tube was placed. On the 11th day after the surgery, hemorrhage occurred in the bile duct tube, and the patient went into shock. Emergency abdominal angiography was performed. A false aneurysm was detected in A6 and embolized using a microcoil. After transcatheter arterial embolization (TAE), hemorrhage stopped, and the patient was discharged. Patient No. 2 was a 68-year-old male who was diagnosed as having cholelithiasis and underwent PTBD. On the 21st day after PTBD, biliary hemorrhage occurred and the patient fell in shock status. Emergency abdominal angiography was performed. A false aneurysm was detected in A3 and embolized using a microcoil. After TAE, cholangioscopic lithectomy was performed and the disease alleviated. Thereafter the patient was discharged. It is necessary to consider false aneurysm when biliary hemorrhage occurs after PT(G)BD.