In the title complex, [CuCl2(C12H24S6)](n), the CuCl2 unit and the ligand lie on and about inversion centres, respectively. The coordination geometry at Cu-II is a tetragonally elongated octahedron with the equatorial positions occupied by two chlorides, Cu-Cl 2.2786 (12) Angstrom, and two S donors, Cu-S 2.3710 (13) Angstrom. The apical positions of the octahedron are defined by two S donors at distances of 2.8261 (14) Angstrom from the metal. The macrocyclic ligand adopts a very puckered and distorted conformation. Eight of the 18 torsion angles are less than 90 degrees and all S-donors are oriented exo to the ring.