Mullerian adenosarcoma has been described as an uncommon variant of Malignant Mixed Mullerian tumors (MMMTs) and a distinctive biphasic uterine tumor with benign proliferative glands and a sarcomatous stroma. It is considered that it is a tumor of low grade malignancy with relatively good prognosis, but the possibility of recurrence is still high and in occasional cases metastasis have been documented. We experienced one case that was diagnosed as Mullerian adenosarcoma of uterine corpus by pathologic biopsy obtained after surgery and report with the brief review of literatures.