A poly-Schiff base consisting of an alternating double bonds chain, having side groups capable of forming complex salts, has been synthesized. Electrical conductivity measurements at room temperature at different times were performed on the original polymer and on its complex salts with Ni⁺⁺, Cu⁺⁺, Co⁺⁺, Cr⁺⁺⁺. It appears that complex salts have an electrical conductivity that is lower by one or two order of magnitude than that of the original polymer. Furthermore the electrical conductivity of both polymer and complex salts decreases with time possibly owing to oxidation phenomena.