Thermoelectric properties have been investigated on n-type PbTe material composed of 2 segments with different electron concentrations ne. The 2-segment material was prepared by liquid state diffusion bonding of two kinds of solidified ingots. ne of the ingots were 3/spl times/10/sup 24/ and 6/spl times/10/sup 25//m/sup 3/. The ingot of 3/spl times/10/sup 24//m/sup 3/ had higher power factor below 500 K, while the ingot of 6/spl times/10/sup 25//m/sup 3/ had higher factor above 500 K. The ingot with higher ne was for higher temperature use. When the temperature difference was given with the jointed interface of more than 450 K, the 2-segment material was found to give higher maximum power than the original ingots. From these results, the segmentation with graded ne is effective in improving the power generating performance of n-type PbTe.