A novel guanidine compound having excellent fungicidal activity is represented by formula [I]. (In the formula, Y represents a divalent group represented by formula [II] (wherein each of R 7 -R 9 independently represents a hydrogen atom or the like) or the like； each of X and Z independently represents an unsubstituted or substituted alkylene group or the like； each of Q 1 and Q 2 independently represents a single bond or the like； each of A 1 and A 2 independently represents an unsubstituted or substituted divalent heterocyclic compound residue or the like； and each of R 1 -R 6 independently represents a hydrogen atom or the like.)
