Spontaneous retroperitoneal hemorrhage is a rare complication after percutaneous coronary intervention (PCI). The patient can be in danger if bleeding is not stopped immediately. However, it is not easy to control the bleeding completely because the bleeding foci can be multiple and there is a rich network of collateral circulation. We report a case of spontaneous retroperitoneal hemorrhage successfully treated using multiple microcoils. One year later, panhypopituitarism occurred as a likely consequence of the accompanying hypovolemic shock.