Polythiophene (PTh) was prepared by the direct electrochemical synthesis in an ionic liquid ([BMIM]PF6) containing 0.1 mol/L thiophene by cyclic voltammetry, constant potential and constant current techniques. It is found that smooth and bluegreen PTh films can be obtained at a potential of ca. +1.75 V ( vs. Ag/AgCl ) or a current of ca. 1.5 mA cm-2 in the ionic liquid. Polythiophene (PTh) was prepared by the direct electrochemical synthesis in an ionic liquid ([BMIM] PF6) containing 0.1 mol / L thiophene by cyclic voltammetry, constant potential and constant current techniques. It is found that smooth and blue green PTh films can be obtained at a potential of ca. +1.75 V (vs. Ag / AgCl) or a current of ca. 1.5 mA cm -2 in the ionic liquid.