Objevtive: We aimed to determine the duration of hospitalization and the parameters affecting mortality of the patients hospitalized with upper gastrointestinal bleeding diagnosis in our service. Materials and Methods: Archive records of 71 patients hospitalized and treated for upper gastrointestinal bleeding between 2015-2017 were retrospectively reviewed at Ordu University Medical School Training and Research Hospital Internal Medicine Service. Patients were evaluated for age, gender, presence of additional illness, history of drug use that could lead to bleeding, hemogram values at presentation, shape of bleeding, recorded endoscopic diagnosis, length of stay in hospital and blood transfusion volume. Results: The most frequent endoscopic diagnoses were duodenal ulcer (%42.2), gastric ulcer in second frequency (%25,3) and acute erosive gastritis in third frequency (%15,4). Nonsteroidal analgesic drug was used in 56 (%78.8) patients and anticoagulant drug was used in 12 (%16.9) patients. Patients who were hospitalized for the longest time in the hospital were found to have additional comorbid diseases in the elderly (average age of 81 years and over was 5.8 ± 2.6 days). Conclusion: The most common cause of upper gastrointestinal bleeding in our patients is duodenal ulcer, the second most common gastric ulcer. Nonsteroid analgesic drug use history was found to be a significant risk factor for bleeding. We also found that patients with upper gastrointestinal bleeding were at the beginning of hospitalization and factors affecting mortality, older age and accompanying comorbid disease as a risk factor.