OBJECTIVE The aim of this study was to determine mortality rates and to evaluate clinical features of patients with active tuberculosis (TB) requiring intensive care unit (ICU) admission. METHODS The medical records of active TB patients requiring ICU admission were retrospectively reviewed over a 5-year period. RESULTS Sixteen patients with active TB admitted to the ICU were included in the study. Seven (43.8%) patients died in the ICU The cause of mortality was septic shock in 5 patients and respiratory failure in 2 patients. The Acute Physiology and Chronic Health Evaluation II (APACHE II) and Sequential Organ Failure Assessment (SOFA) scores were higher in patients who died (P = 0.012 and 0.048, respectively). Six of the 8 immunosuppressed patients and 1 of the 8 nonimmunosuppressed patients died (P = 0.041). The median mechanical ventilation (MV) duration was longer in patients who died (11 (5-45) days) than in patients who survived (4.5 (3-7) days) (P = 0.036). Seven of the 8 patients with nosocomial infection and/or coinfection died, while all of the patients without additional infection survived (P = 0.01). CONCLUSIONS Active TB patients admitted to the ICU had higher mortality rates, especially patients with immunosuppression, nosocomial infection, high APACHE II and SOFA scores, and patients receiving MV.