Polymer complexes of 5-vinylsalicylidene aniline with some transition metal salts were prepared and characterised by elemental analyses, IR, electronic spectroscopy and magnetic moment measurements. Thermal stabilities of the polymer complexes were compared with poly(5-vinylsalicylidene) aniline homopolymer, and the order of stabilities of the complexes was given. The activation energies of the polymer complexes were calculated.