Fungicidal mixtures comprising, as active components, 1) at least one 3-mono disubstituted N-biphenylpyrazolecarboxamide of the formula I in which X=oxygen or sulfur; R1=cyano, nitro, halogen, C1-C6-alkyl, C1-C6-haloalkyl, methoxy, difluoromethoxy, trifluoromethoxy, methylthio, difluoromethylthio or trifluoromethylthio; R2=halogen, C1-C4-alkyl or C1-C4-haloalkyl; R3=hydrogen or halogen; and 2) at least one active compound II selected from active compound groups A) to F): A) azoles; B) strobilurins; C) carboxamides; D) heterocyclic compounds; E) carbamates; F) other fungicides; in a synergistically effective amount, methods for controlling harmful fungi using mixtures of at least one compound I and at least one active compound II, the use of the compound(s) I with active compounds II for preparing such mixtures and also compositions and seed comprising these mixtures.