Pulmonary-gastric fistulae are extremely rare and can occur secondary to infection or malignancy invading through the lung into the pleural space, through the diaphragm, and into the stomach. A 40-year-old man presented to our facility with left lower lobe lung abscess and thoracic empyema; further investigation revealed a pulmonary-gastric fistula. There was no history of trauma or operation. Upper gastrointestinal endoscopy demonstrated no gastric malignancy or perforated ulcer. Spontaneous closure of the fistula was observed in our patient after thorough conservative management of infection with appropriate antibiotic and parenteral nutrition. Upper gastrointestinal series revealed a healed defect in the gastric fundus without leakage of dye.