Gastrointestinal complications after open-heart surgery are rare. Many preoperative, intraoperative, and postoperative factors may predispose patients to these complications or cause them. Our patient was a 64-year-old woman who underwent aortic valve replacement due to aortic stenosis. Free intra-abdominal hemorrhage occurred on the 2nd postoperative day. During exploratory laparotomy, it was determined that the hemorrhage was from a vein near the falciform ligament of the liver and from a bleeding laceration of the splenic capsule. The complication was repaired surgically. To our knowledge, intra-abdominal hemorrhage of both liver and spleen after open-heart surgery has never been reported before, even in large patient series. We report the case and present our ideas regarding the cause of the bleeding.