The title compound, [Cu(2)(NCS)(2)(C(13)H(17)Cl(2)N(2)O)(2)], was obtained by the reaction of 3,5-dichloro-salicylaldehyde, N,N-diethyl-ethane-1,2-diamine, sodium thio-cyanate, and copper(II) acetate in an ethanol solution. It crystallizes as a centrosymmetric dimer with a very long Cu⋯S axial bond [2.972 (3) Å]. The Cu atom is five-coordinated by the three donor atoms of the Schiff base ligand, 2,4-dichloro-6-[(2-diethyl-amino-ethyl-imino)meth-yl]phenol, one N atom of a thio-cyanate group, and one S atom of a symmetry-related thio-cyanate group, forming a slightly distorted square-pyramidal geometry.