A substituted cycloalkyl- or heterocyclyl-carboxanilide of the formula (I) ##STR1## in which X stands for an unsubstituted or an alkyl-substituted cycloalkyl or an unsubstituted or an alkyl-substituted heterocyclic,Hal stands for halogen andY.sup.1, Y.sup.2 and Y.sup.3 independently of one another stand for hydrogen, halogen, an unsubstituted or a halogen-substituted alkyl, an unsubstituted or a halogen-substituted alkoxy or an unsubstituted or a halogen-substituted alkylthio. Such substituted cycloalkyl- or heterocyclyl-carboxanilides are useful as fungicides.