AT PRESENT, VARIOUS HERBICIDAL COMPOSITIONS HAVE BEEN DEVELOPED AND USED, BUT THEY ARE NOT NECESSARILY SUFFICIENT TO CONTROL UNDESIRED PLANTS SUCH AS WEEDS TO BE CONTROLLED, AND A HIGHLY ACTIVE HERBICIDAL COMPOSITION HAS BEEN DESIRED. A HERBICIDAL COMPOSITION COMPRISING 1-(4, 6-DIMETHOXYPYRIMIDIN-2-YL)-3-(3-TRIFLUOROMETHYL-2-PYRIDYLSULFONYL) UREA OR ITS SALT AND 2-(4, 6- DIMETHOXYPYRIMIDIN-2-YLCARBARNOYLSULFAMOYL)-N, N-DIMETHYLNICOTINAMIDE OR ITS SALT, AND A METHOD FOR CONTROLLING UNDESIRED PLANTS USING IT.