The temperature and frequency dependences of the pyroelectric current have been studied in Nylon 7 and Nylon 11 ferroelectricpolymer films. A remarkable change of value of the pyroelectric currents near the glassytransition temperature (T g ) was observed. Analyses of experimental data show that the temperature behavior of pyroelectric currents can be explained by the competition of the primary and secondary effects. Currents due to these effects have different signs. Below T g , the dominant component of the pyroelectric current is primary pyroelectricity, and above T g the secondary effect becomes dominant. Mechanisms producing pyroelectric currents in Nylon 7 and Nylon 11 are discussed.