Cobalt complex with benzoic acid hydrazide was synthesized and the synthesized complex was characterized by various analytical and spectral methods. The complex corresponds to formula [Co(BH)3]H2O. The complex was non electrolyte in nature. Dehydration study shows that complex contains one lattice water molecule. Infrared spectral analysis shows that the ligand, benzoic acid hydrazide coordinate to the Cobalt through ketonic oxygen and terminal NH2. Electronic spectral shows that the Cobalt is in d7 configuration and octahedral geometry around central metal ion