This study evaluated a simple method for preparing microstructures of polyaniline (PANI) andpolypyrrole(PPy)using a different concentrations of Escherichia coli (E. coli) as a biological template. Scanning electron microscopy and transmission electron microscopy revealed fibers, cones/spheres, andagglomerated fiber structures withdimensions ranging from 0.5 to 1 ${mu}m$. The results yielded structures with shapes that varied according to the E.coli concentration. Based on these results, this study suggests that the biological templating approach canbea superior alternative to preparing and fabricating conducting polymers that maybe useful for obtaining nano- or micromaterials anddevices.