Tuberculosis is a granulomatous disease with a variable clinical spectrum. The objective is to present a case with miliar tuberculosis, one of the least frequent clinical forms of the disease, and the use of the clinical method provided an accurate diagnosis. We present a 54-year-old male, non-smoker, alcoholic who attended in the Ameijeiras Brothers Surgical Clinical Hospital for referring to a history of unproductive cough, headache, fever, loss of appetite, and weight two months of evolution. Chest X-ray and CT showed a miliar pattern and direct bacilloscopy confirmed the presence of Mycobacterium tuberculosis. Miliar TB is very rare but can be suspected by a miliar radiological pattern and confirmed by microbiological analysis.