Breast cancer metastasis typically occurs in the lungs, bones, brain, and liver. Breast metastases to the kidney are uncommon. A case of metastatic kidney cancer is described by us. A 33-year-old woman with breast cancer who underwent a left mastectomy at the age of 30 and received chemotherapy to treat pulmonary and cerebral metastases. Two lesions in the right kidney were seen on the CT scan. He imitated a primary tumor in the kidney. Metastases from breast cancer were confirmed by percutaneous kidney tumor biopsy. Systemic chemotherapy was used instead of kidney surgery to treat the condition.