Extrauterine, nongestational choriocarcinoma is uncommon. Most cases arise in the gonads, mediastinum or retroperitoneum with a striking male predilection. Although the lungs are a frequent site of metastatic choriocarcinoma, primary choriocarcinoma of the lung is extremely rare. Recently we experienced a case of primary choriocarcinoma of lung in 28-year-old female. So we report the case with review of literature including radiologic findings.