Herbicidal compositions comprising A) 2-[2-chloro-3-(2,2,2-trifluoroethoxymethyl)-4-methylsulfonylbenzoyl]cyclohexane-1,3-dione and B) at least one compound from the group consisting of ethoxysulfuron, flumetsulam, halosulfuron, imazamox, imazapyr, imazaquin, imazethapyr, metosulam, nicosulfuron, primisulfuron, prosulfuron, rimsulfuron, thifensulfuron-methyl, triflusulfuron, foramsulfuron, ametryne, atrazine, bromoxynil, cyanazine, diuron, hexazinone, metribuzin, pyridate, terbuthylazine, 2,4-D, clopyralid, dicamba, diflufenzopyr, fluoroxypyr, butylate, EPTC, fenoxaprop-P-ethyl, acetochlor, alachlor, dimethenamid, flufenacet, mefenacet, metolachlor, thenylchlor, S-metolachlor, fluthiacet-methyl, carfentrazone-ethyl, isoxaflutole, mesotrione, sulcotrione, 4-(4-trifluoromethyl-2-methylsulfonylbenzoyl)-5-hydroxy-1-methyl-3-methylpyrazole, glyphosate, pendimethalin, trifluralin, asulam, triaziflam, diflufenican and glufosinate-ammonium against monocotyledonous and/or dicotyledonous harmful plants are described. The activity of these compositions is superior to that of the herbicides applied individually.