We report a case of tuberculous pericarditis which presented with syndrome of inappropriate secretion of antidiuretic hormone (SIADH). This 84-year-old man was admitted due to fever and a large amount of which fulfilled the criteria of SIADH. We made a clinical diagnosis of suspicious tuberculous pericarditis based on echo-guided pericardiocentesis and his clinical history. He was immediately given standard antituberculosis drugs and corticosteroid therapy. His pericardial fluid became positive on the 47th day. We reviewed the literature on tuberculosis pericarditis with SIADH since 1960 and found no such previous report. We present this case to remind clinicans that when controlled with pericardial effusion and SIADH or hyponatremia, tuberculous pericarditis should be considered and ant-tuberculosis treatment begun early to save the patient.