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 is desired. A herbicidal composition comprising 1-(4,6-dimethoxypyrimidin-2-yl)-3- (3-trifluoromethyl-2-pyridylsulfonyl)urea (flazasulfuron) or its salt and 2-(4,6- dimethoxypyrimidin-2-ylcarbamoylsulfamoyl)-N,N-dimethylnicotinamide (nicosulfuron) or its salt, and a method for controlling undesired plants using it.