Indonesia is one of country that contributes the most cases of tuberculosis worldwide. Tuberculosis is the most commonly etiology of exudative pleural effusion. There have been many studies about undiagnosed exudative pleural effusion, but there are not many studies about the use of medical thoracoscopy for diagnosing transudative and exudative pleural effusion, especially on biomarkers of C-Reactive Protein (CRP), D-dimer, Adenosine Deaminase (ADA), Antinuclear Antibody (ANA), C3 C4 complements, Cancer Antigen 125 (CA-125), Xpert Mycobacterium Tuberculosis (Xpert MTB), Lupus Erythematosus cell (LE cell), cytology (effusion and smear) and histopathology. Information gained from those biomarkers via thoracenthesis and medical troracoscopy, etiology of exudative and transudative pleural effusion can be detected earlier and clearly, especially etiology of infection, autoimmune, and malignancy that further can be used to reduce patients' hospitalization period, mortality, and to develop the new therapeutic agents.