Objective: Adenoid cystic carcinoma of the breast is a rare variant of breast cancer that accounts for 0.1 % of all breast carcinomas and occurs commonly in women between the ages of 25 to 80. In the literature, only a few examples have been reported in men. It is well-differentiated tumour with favorable prognosis and generally presents as a painful breast mass. Method: Here, we are presenting a 60 years old male patient with a 13×8 mm diameter solid mass on left breast retroareolar region. On fine needle aspiration biopsy, there were 'atipical proliferating ductal epitelial groups'. Then, hookwire localization and excision have been performed. Microscopically, there were tubulary and cribriform islands composed of basaloid type cells with eosinophilic cytoplasm and myxoid material in the cribriform spaces at the center of the islands. We used immunohistochemical markers such as P 63, S 100, CK 7, CD 117, CK 14 and Smooth Muscle Actin for differential diagnosis. Results: The diagnosis was 'Adenoid Cystic Carcinoma'. The margins of the tumor were positive, so radical mastectomy was performed for treatment. Conclusion: Because adenoid cystic carcinoma of the breast in male is a very rare example, we present our case here.