The present invention provides an antifungal composition that contains, as an active ingredient, a cyclic N-sulfonyl amine compound, a cyclic N-sulfonyl imine compound or a cyclic N-sulfonyl oxaziridine compound, which has antifungal activity. An antifungal composition which contains, as an active ingredient, a compound represented by formula (1) or a salt thereof. (In the formula, ring A represents a five- to seven-membered heterocyclic ring which may be additionally substituted； the five- to seven-membered heterocyclic ring may be fused with 1-2 rings selected from among optionally substituted benzene rings and optionally substituted five- to seven-membered heterocyclic rings； X represents -N=, -NR2- or -O-； Y1 represents a hydrogen atom and Y2 represents a hydroxy group, or alternatively, Y1 and Y2 may combine together or represent -O- together； R1 represents a hydrogen atom, an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group； and R2 represents a hydrogen atom or an optionally substituted hydrocarbon group.)
