Mammary tuberculosis is rare even in endemic countries.It touches the young woman of childbearing age and it is favored by multiparity, pregnancy and lactation.Clinic and imagery are not specific. It presents a problem of differential diagnotic with neoplasic disease. The use of histological or bacteriological study is essential for diagnostic.Treatment is primarily medical based on antitubercular therapy and evolution is generally favorable.We report three cases of breast tuberculosis collected from the respiratory service of Moulay Ismail military hospital in Meknes. The diagnostic was confirmed by histological study of breast biopsies.The objective of this work is to study epidemiological, clinical, paraclinical, therapeutic and evolutionary characteristics of this entity and to review the diagnostic difficulties