P-type Bi0.5Sb1.5Te3 compounds doped with 3wt.% Te were fabricated by spark plasma sintering after mixing large powders (P-L) and small powders(P-S). We obtained the highest figure of merit(Z(c)) of 2.89X10(-3)/K in sintered compound mixed to P-L:P-S=80:20. This resulted from the increase of orientation by large powders (P-S) and the reduction of pores by small powders. The figure of merit(Z(c)) of the sintered compound using only small powders (P-S) showed a lower value of 2.67X10(-3)/K compared with that of sintered compound mixed to P-L:P-S=80:20 owing to the increase of electrical resistivity.