The extracting properties of TPTZ (2, 4, 6 - tri, (2-pyridyl) - 1, 3, 5 - triazine) were investigated. The extraction yields of actinide and lanthanide depended on the TPTZ concentration, the HDNNS (dinonylnaphthalenesulfonic acid) concentration and the acidity. A favorable TPTZ concentration was found to be about 0.032M. The appropriate nitric acid concentration and HDNNS concentration were confirmed to be about 0.125M and 0.05M, respectively.