<p>Provides is a process for preparing aromatic disulfide using aromatic sulfonyl chloride as a starting material and via aromatic sulfonate as an intermediate. The process of the present invention secures industrially advantageous reaction conditions via use of an iodine derivative as a catalyst, is economically advantageous due to use of inexpensive starting materials and reducing agents as compared to known methods and recovery of the catalyst, and can maximize the purity of the products via re-oxidation of thiophenol which is present as impurities in aromatic disulfide that is a final product of reduction reaction. The present invention can be widely applied to various fields of fine chemistry.</p>
