Small particles of AgI with various average size (140-680 nm) have been prepared by a gas-evaporation method. The powder X-ray diffraction patterns show that they are mixture of gamma- and beta-phases, and the mass fraction of the latter is roughly estimated at 20-25%. The room temperature conductivity of a polycrystalline pellet of small AgI particles shows enhancement by decreasing particle size, and the conductivity of 1.4 x 10(-4) Omega(-1) cm(-1) has been observed in 140 nm-grain AgI polycrystal. The overall activation energy for conduction varies from 0.38 to 0.28 eV, depending on the average size of the particles.