The present invention relates to N- (tetrazol-5-yl)-N- triazol-5-yl (formula) aryl carboxamides and its as the purposes of herbicide. N or CH is represented in the formula I, B, R2 indicates alkoxy, halogenated alkoxy, alkyloxy-alkoxy and R2b-S (O) k, and R, R1, R3, R4 and R5 represent group such as hydrogen, halogen or organic group such as alkyl or phenyl.