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 R7-R9 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 Q1 and Q2 independently represents a single bond or the like; each of A1 and A2 independently represents an unsubstituted or substituted divalent heterocyclic compound residue or the like; and each of R1-R6 independently represents a hydrogen atom or the like.);
