A rare case of upper gastrointestinal hemorrhage due to synchronous metastases to the esophagus and stomach from an asymptomatic lung cancer is reported. A 51-year-old white man presented with hematemesis and an emergency endoscopy revealed submucosal tumorous lesions with central ulcerations in the esophagus and stomach. A needle aspiration biopsy revealed the presence of cellular proliferation of adenocarcinoma, which led to the diagnosis of lung cancer, along with a chest radiograph revealing a tumor in the right middle lung field. The importance of conducting an upper gastrointestinal endoscopic examination for staging of patients with lung cancer is stressed.