The primary angiosarcoma of the breast is a tomor which is seen rarely. The sarcomas are seen less than 1% in the breast cancers. Angiosarcoma is a rarely mesenchymal tumor which is seen most common in the breast, also in the heart, pericardium, liver, skin, bone and soft tissues. Diagnosis is made by biopsy. Mastectomy is applied during the treatment. The usefulness of chemotherapy and radiotherapy should be discussed. In this report, a 31-year-old woman with primary breast angiosarcoma is presented with literature reviews.