To provide a stability improver of an aromatic compound, which is capable of improving stability of the aromatic compound, and a method for improving stability of an aromatic compound.The stability improver of an aromatic compound of the present invention includes (A) at least one selected from resorcin and its derivatives, and salts thereof. The aromatic compound may be at least one selected from an aromatic amine, an aromatic nitro compound, a phenol compound, an aromatic azo compound, and a fused ring compound.
