Abstract: The Manganese (II) and Cobalt (II) complexes of o-benzoyl benzoic acid were prepared and characterised by magnetic susceptibility, molar conductivity, thermal analysis and spectroscopic Techniques (FTIR and UV). The IR spectral studies revealed that o-benzoyl benzoic acid behaves as a bidendate ligand and coordinate to the metal ions via; the two carbonyl oxygen. Electronic spectral studies and magnetic studies suggest that Manganese (II) complex is in octahedral geometry except the cobalt complex. The conductance studies show that, cobalt complex is electrolytic in nature. The thermal study explained the stability of the complexes and decomposition.