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We investigate the electrical properties of Sm-doped Bi4-xSmx Ti3O12 (BST) ceramics prepared by a conventional electroceramic technique. The x-ray diffraction analysis reveals the Bi-layered perovskite structure in all samples.The SEM micrographs show randomly oriented and plate-like morphology. For the samples with x = 0.4 and 1.0,the current-voltage characteristics exhibit negative differential resistance behaviour and the P-V hysteresis loops are characterized by large leakage current, whereas for the samples with x = 0.6 and 0.8, the current-voltage characteristics show simple ohmic behaviour and the P-V hysteresis loops are of the saturated and undistorted hysteresis. The remanent polarization and coercive field of the BST ceramic with x = 0.8 are above 32μC/cm2and 70kV/cm, respectively.