In the crystal structure of the title centrosymmetric dimer, [Cu2(C26H36N4O6)] (1) , the Cu(II) atom has an almost perfect square-pyramidal geometry. The Cu (II) ion is coordinated by N2O donor atoms of the salen based tri dentate Schiff base ligand and, the two O atoms of two acetate groups. The present study demonstrates a novel example of binuclear copper (II) complex with two tri dentate salen ligands and two bridged acetate groups. The independent part of the complex is shown in figure. In the structure of the title compound, each Cu(II) ion is coordinated with two nitrogen atoms (N(1) and N(2) and one oxygen atom (O1) from tridentate salen ligand and one oxygen of the acetate group, forming [OAC)CuL] unit. To complete the coordination sphere around the copper atom, two of these units dimerism over the oxygen atom of acetate group to form a Centro symmetric molecule. In the planar Cu2 O2 core, each copper atom displays a distorted squarepyramidal geometry. Crystal data for complex at 120 K: monoclinic, space group P 21/n, a = 11.0102 (9) o, b = 8.2177 (7) o , c = 15.4288 (12) o , β= 103.041 ( 2) , V = 1359.97 (19) Å3, Z = 2, R= 0.048.