A haloalkylsulfonanilide derivative represented by the formula (I): {wherein R<1> represents haloalkyl; R<2> represents H, alkylcarbonyl, optionally substituted phenylcarbonyl, alkoxycarbonyl, optionally substituted phenoxycarbonyl, optionally substituted phenylsulfonyl, etc.; R<3> and R<4> each represents H, alkyl, cycloalkyl, halogeno, CN, etc.; R<5>, R<6>, R<7>, and R<8> each represents H, halogeno, alkyl, cycloalkyl, optionally substituted phenyl(C1-6 alkyl), an optionally substituted heterocycle, etc.; A and W each represents O or S; and X represents one to four substituents selected among H, halogeno, alkyl, alkenyl, optionally substituted phenyl, optionally substituted phenylalkylaminocarbonyl, OH, CN, etc.} and a salt thereof; and a herbicide containing any of these compounds as an active ingredient. The herbicide is excellent in wide applicability, persistency, and selectivity for crops and effectiveness against weeds. It is excellent especially as a herbicide for rice fields.