Sclerosing stromal tumor is a rare benign neoplasm of the ovary. In this study six cases of sclerosing stromal tumor of the ovary are presented. All the tumors occured in young patients. The data of the study in which Calretinin, Inhibin, Actin, Oestrogen, Progesterone Receptor and Ki-67 antibodies have been used, supported the idea that these tumors originate from the ovarian stroma and had a benign characteristic.