The complete mol-ecule of the title compound, C(16)H(12)Cl(2)N(2)S(3), is generated by crystallographic twofold symmetry, with the S atom of the thiadiazole ring lying on the rotation axis. The dihedral angle between the mean planes of the 1,3,4-thia-diazole and benzene rings is 87.19 (7)°. In the crystal, mol-ecules are linked by C-H⋯N inter-actions and short S⋯S contacts [3.3389 (9) Å] occur.