The current – voltage (I–V) characteristics and electric conduction mechanisms for a bulk ceramic perovskite system of the compositions Sr(1-x)LaxTiO3 (SLT) with ( x = 0.05, 0.1 and 0.2 ) have been investigated at different temperatures between (294K-523K). At low voltage region, the conduction was found to be due to thermally generated carriers. At higher voltages, the conduction mechanism was satisfactory explained by the modified Pool–Frenkel type. It was found that the samples possess a typical semiconductor-like behaviour. The activation energy decreased with increasing La content. The effect of composition and temperature on electrical conductivity, the field lowering coefficient βexp. and the activation energy Ea have been studied.