The title compound, [Cd(C8H6BrNO4S)(C12H8N2)(CH4O)], incorporating a Schiff base formed by amino-methane-sulfonic acid and 5-bromo-salicylaldehyde, was synthesized in a water-methanol solution. In the structure, the CdII atom is six-coordinated by one O atom from a methanol mol-ecule, two N atoms from a 1,10-phenanthroline ligand, and one N and two O atoms from the Schiff base in a distorted octa-hedral coordination geometry. A one-dimensional chain structure is formed via C - H⋯O hydr...