We report three cases of male breast myofibroblastoma. This uncommon benign tumor arises from breast mesenchyma and is more frequently seen in adult men. Mammographic findings consist of a well-delimited, round to oval dense mass, variable in size but usually 1-4 cm in diameter. No microcalcifications were observed. Ultrasonography confirms the solid nature of the lesion, showing a well-circumscribed, homogeneous, hypoechoic mass, compressible with pressure. Although FNA cytology may support the diagnosis, surgical biopsy should be performed. Tumorectomy is the treatment of choice. To our knowledge, no more than 40 cases of breast myofibroblastoma have been reported. This is the first report in the literature which emphasizes the mammographic and ultrasonographic features of this tumor.