In the title three-dimensional coordination polymer, [Cd(N(3))(2)(C(8)H(10)N(4))](n), the coordination geometry around the Cd(II) atom is distorted octa-hedral. The Cd(II) atom is coordinated by two N atoms from two cis-positioned bridging 1,2-bis-(imidazol-1-yl)ethane (bime) ligands and four N atoms from four azide anions. Each azide ligand acts in an end-on bridging coordination mode. The azide ligands and Cd(II) atoms form a one-dimensional zigzag chain constructed from four-membered [Cd(N(3))(2)](n) metallacycles extending along the a axis. These inorganic chains are connected with four other chains via bridging bime ligands to form a three-dimensional coordination network.