We retrospectively reviewed the records of pregnant patients who required an ERCP, Endoscopic Retrograde Cholangio Pancreatography, during the last 12 years in Manizales, Colombia. Twenty seven procedures were done in 26 patients. The indication was obstructive jaundice and a high suspicion of choledocholithiasis based on ultrasound findings and laboratory results, in symptomatic patients. The average age was 28.4 years. The mean duration of gestation was 20.9 weeks. One procedure was required in 25 patients and two in one. Of fourteen patients had choledocholithiasis, thirteen had their stones removed. In the one patient in whom the stones could not be removed, a stent was placed as a temporary measure during pregnancy. Another patient required a stent for a dominant stricture due to primary sclerosing cholangitis. In four patients the indication was biliary pancreatitis; in two, stones were found and extracted and all had a sphincterotomy. There was no recurrence of pancreatitis in these 4 patients. Mean fluoroscopy time was 0.9 minutes. Abdominal protection was used and hard copy radiographs were not taken. Follow up was possible in 20 patients. Eighteen had healthy babies on delivery, and two had fetal death after premature delivery in the third trimester, not related to the ERCP procedure, both had surgery with common bile duct exploration before the ERCP. Therapeutic ERCP is a safe alternative in pregnant patients for the treatment of Choledocholithiasis.