Alcohol extracts of six plant namely Coix agrestis L$_{OUREIRO}$, Chloranthus Japonicus (Siebi) N$_{AKAI}$, Ajuga Spectabilis N$_{AKAI}$, Juglans mandsuria Max., Cirsium Macki var Ussuriense $K_{ITA}$ and Sasamorpha Purpurascense (Hack) N$_{AKAI}$ were subjected to the screening tests for anti-tumor activities against SN-36 Leukemia, Sarcoma 180 and Ehrlich ascites carcinoma. Of the six extracts, Ajuga Spectabilis N$_{AKAI}$ and Coix agrestis L$_{OUREIRO}$ were found to be potential in survival effect of tumor transplanted mice.