Ionic conductivities of twin-roller rapidly quenched AgI-Ag2O-B2O3 glasses (Ag2O/B2O3 = 3) were measured in a wide temperature range between 200 and 400 K. The activation energy E(a) for conduction of the glass with 50 mol% AgI was not changed in the whole temperature range. However, the E(a) values of the glasses with 60 and 70 mol% AgI were largely changed at around 240 K; the E(a) values below 240 K were larger than those above 240 K. The glasses containing 60-80 mol% AgI had an inhomogeneous morphology. These inhomogeneities in rapidly quenched AgI-Ag2O-B2O3 glasses containing large amounts of AgI were supposed to be closely related to the change in E(a) at around 240 K.