This article reports the effect of Ag impurity (low similar to 4 and similar to 6 at.% and high similar to 10 at.%) on the ac conductivity (sigma (ac)) of a-Ge20Se80 glass. Frequency (omega)-dependent ac conductance and capacitance of the samples over a frequency range similar to 100 Hz to 50 kHz was taken in the temperature range similar to 268-358 K. At frequency 2 kHz and temperature 298 K, the value of sigma (ac) increases at low as well as at higher concentration of Ag. The sigma (ac) is proportional to omega (s) for undoped and doped samples. The value of frequency exponent (s) decreases as the temperature increases.