An ionic conjugated polymer)-, bromide) having propargyl side chain. (PEPB-P), was prepared by the activated polymerization, of 2-ethynylpyridine with propargyl bromide in high, yield. The electrochemical properties of PEPB-P were studied by using cyclic vollammograms. PEPB-P showed the well-defined and stable redox process at - 0.1 to + 1.6V The oxidation and reduction occurred at 0.84 and 0.69V, respectively. The redox current value increased (is the increased scan rate and the exponent of scan rate x value was found to be 0.75, which means that the redox kinetics is mainly controlled by both electron transfer and diffusion process.