We present a case of pregnancy after complete conservative surgical treatment in a young woman with malignant mixed germ-cell tumor of the ovary. She was submitted to surgical treatment involving only unilateral salpingo-oophorectomy, with infracolic omentectomy and dissection of the pelvic and paraaortal lymph nodes. Three years after the operation and chemotherapy the patient spontaneously conceived and gave birth to a healthy baby. A patient who has malignant germ-cell tumor of the ovary in early stage, can successfully preserve fertility by conservative surgical treatment.