An autopsy case of Intracranial malignant teratoma, In an 8 years old female, is presented in this reprot. Clinically, pregnancy test was positive and human chorionic gonadotropins of high titer were found in the urine but precocious puberty was not seen. The tumor was composed of differentiated teratomatous components and embryonal carcinoma with small foci of choriocarcinoma. Embryonal carcinoma seemed to undergo trophoblastic differentiation. These histological findings have been discussed from the viewpoint of its histogenesis and differentiation.