Abstract: Novel triazine derivatives represented by the general formula (I): ##STR1## (wherein all the symbols are as defined in the appended claims), and herbicides containing the triazine derivatives of the general formula (I) as effective component. These triazine derivatives can exhibit their herbicidal activity against various types of weeds from annual weeds to perennial weeds while causing no injury against paddy rice plants. Thus the herbicides of the present invention have advantages in that the herbicidal effect is great, the chemical damage is low, and the weed-killing spectral width is broad.