The electric conductivity and the mechanical properties of electrochemically synthesized polypyrrole/p-toluene sulfonic acid (PPy/pTSA) as a function of its processing parameters were investigated. The influence of polymerization current density, pyrrole concentration, and counter ion concentration on the electric conductivity of thick (>100 mu m) polymer films was examined and the electric conductivity was found to be in a range between 1.6 and 97 S . cm(-1). Analysis of the polymer's chemical composition delivered a result in agreement with literature data of one counter ion for every 2.97 pyrrole rings for the best conducting samples. In mechanical tests, maximum values for Young's modulus, tensile strength, and elongation at break, were found to be 4.0 GPa, 72.6 MPa, and 11.2%, respectively.