The incidence of abdominal trauma has increased in recent decades as the frequency of traffic accidents increased. Early symptoms and signs of blunt abdominal trauma may be absent and associated injuries frequently detract physicians from early diagnosis of abdominal trauma. Delayed diagnosis has been shown to be associated with higher morbidity and mortality. Gastrointestinal tract is the third most commonly injured organ from blunt abdominal trauma. Gastric ruptures after blunt abdominal trauma were reported occasionally, but reports of upper gastrointestinal bleeding by gastric mucosal tear were very rare. Four cases of upper gastrointestinal bleeding due to gastric mucosal tear after blunt abdominal trauma are herein reported with a review of related literatures.