Chylothorax is a rare event that occurs when milk-like lymphatic fluid accumulates in the pleural space. The common causes of chylothorax are tumors, trauma, or other unknown etiologies. Liver cirrhosis has been classified as one of the uncommon etiologies of chylothorax with a worse prognosis than other etiologies. Patients often die from malnutrition or an immunocompromised status. This report describes a patient who suffered from chylothorax with initial presentations of dyspnea and generalized edema. After a series of work-ups, decompensated liver cirrhosis was found to be the only possible etiology. Generally, chylothorax secondary to liver cirrhosis is hard to manage and the prognosis is poor. Many invasive or expensive therapies have been introduced to manage chylothorax secondary to liver cirrhosis, but successful management with noninvasive conservative therapy has not been reported. Our patient was successfully treated with diuretics, and the chylothorax did not recur during the following 12 months under a sodium-restricted diet.