Disclosed is a herbicide composition comprising an isoxazoline derivativeor a salt thereof, which is highly safe to a useful crop, and which can control variousweeds that may cause troubles in a paddy, an agricultural field, a cropland orthe like at any stage falling within a wide weed growth range from a pre-germinationstage to a growing stage. Specifically disclosed is a herbicide compositionwhich comprises a [component A] comprising at least one compound selected fromthe group consisting of an isoxazoline derivative represented by the formula[I] and a salt thereof and a [component B] shown below as active ingredients. [ComponentA] [I] [wherein R and R independently represent a hydrogenatom, a C1-C10 alkyl group, a C3-C8 cycloalkyl group or a C3-C8 cycloalkyl-C1-C3alkyl group, and R and R independently represent a hydrogenatom, a C1-C10 alkyl group or a C3-C8 cycloalkyl group, provided that R,R, R and R, together with a carbon atom to whichthese groups is bound, may form a 5- to 8-membered ring； R and Rindependently represent a hydrogen atom or a C1-C10 alkyl group； Y representsa 5- to 6-membered aromatic heterocyclic group or aromatic hetero fused ringgroup having one heteroatom selected from the group consisting of a nitrogenatom, an oxygen atom and a sulfur atom； and n represents an integer of 0 to 2.] [ComponentB] Imazaquin, diuron, sulfentrazone, sulcotrione, norflurazon, clomazone,or dimethenamid-P, prosulfocarb, isoproturon, trifluralin or triallate.
