The new ligand 2 , 1-bis (2 5 −-thiolethysulphide)-1, 3, 4-oxadiazole-2yl) ethane (BTESOE) was prepared from the reaction of 1-, 2-bis-(2 5 −-chloro ethylsulphide)-1,3,4-oxadiazol-2yl) ethane with sodium sulphide in aqueous ethanol solution. The ligand was characterized using IR, UV/Vis, 1 H-n.m.r, 13 C-n.m.r, mass spectroscopies and molar conductivity. BTESOE was employed to synthesize four complexes with metals (M (II): Cu, Ni, Co and Hg), the complexes were studied using IR, UV/Vis, atomic spectroscopies, molar conductivity and magnetic susceptibilities techniques. The results showed that each of these complexes has an octahedral geometry structures.