Breast hamartoma is a benign and rare tumour consisting of glandular fat and fibrous tissue. A 36-year old woman was admitted to our clinic, complaining of a mass in her right breast since two months. Ultrasonographic and mammographic examinations revealed a 10 cm mass diagnosed as fibroadenolipoma. Total excision of the mass was performed without any complication. Histopathological examination revealed fibroadenomatous hamartoma.