Se prepararon peliculas a partir de almidon de papa con diferentes concentraciones de glicerol, las cuales fueron analizadas por espectroscopia de impedancia (IS), analisis termogravimetrico (TGA), calorimetria de barrido diferencial (DSC) y espectroscopia de infrarrojo con transformada de Fourier (FTIR). Se determino la permeabilidad al vapor de agua por el metodo del desecante (ASTM E-96). El incremento del glicerol en las peliculas genero mayor retencion de humedad incrementando su conductividad. La conductividad DC de las peliculas se incremento con el contenido de glicerol y la temperatura, llegando a ser de 5,93 E-6 Scm-1 a 150 oC para la pelicula G/A = 0,5. Las conductividades de todas las muestras resultaron activadas termicamente en dos regiones de temperatura que se ajustaron al modelo de Arrhenius, cuya frontera se ubica entre 70 - 80 oC, donde tambien se observa un pico endotermico en las curvas DSC. En los graficos de la parte real de la conductividad vs. frecuencia se observo un comportamiento similar al reportado en otros conductores solidos ionicos desordenados estructuralmente, conocido como “respuesta dinamica universal”. Films were prepared from potato starch with different concentrations of glycerol, which were analyzed by impedance spectroscopy (IS), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). It was determined the water vapor permeability by the desiccant method (ASTM E-96). The increase of glycerol in the films generated more moisture retention, increasing their electrical conductivity. The DC conductivity of the films increased with glycerol content and temperature, becoming 5,93 E-6 Scm-1 at 150 o C for the film G/A = 0,5. All sample’s conductivities were thermally activated in two temperature regions and they were fitted to the Arrhenius model, whose border is located between 70 - 80 o C, where an endothermic peak was also observed in the DSC curves. In the plots of the real part of the conductivity vs. frequency were observed a similar behavior as those reported for other structural disordered solid ionic conductors known as “universal dynamic response.’’