Photocurrent was measured with compacted or sintered AgBr powders. The forward-current increased at first and reached the maximum, then decreased to equilibrium value decided by recombination of electrons and holes. Thermally stimulated current and dark conductivity were measured. An activation energy of 0.26 eV was found with both compacted and sintered silver bromide powders. Besides 0.26 eV, activation energies of 0.35 eV and 0.78 eV were obtained in the case of sintered samples. Effects of adsorbed oxygen on the photocurrent were observed and discussed.