A series of new substituted benzimidazole and benzothiazole containing phenoxy moiety and halogenomethylsulfonyl groups were synthesized. Biological activity of synthesized compounds was evaluated in screening tests. The (R) enantiomers of benzothiazole derivatives containing difluoromethylsulfonyl groups in the benzene ring and phenoxy moiety in the imidazole sceleton exhibited good herbicidal activity.