Starting　with　elementary　powders,　thermoelectric　materials　CexCo4Sb12　were　prepared　by　mechanical　alloying　and　spark　plasma　sintering　(MA-SPS).　XRD　analyses　reveal　that　the　expected　major　phase,　named　skutterudite　was　formed　in　MA　process　and　was　kept　after　SPS.　The　thermoelectric　properties　of　MA-SPS　samples　including　resistivity,　See-beck　coefficient,　power　factor,　thermal　conductivity　and　the　dimensionless　figure　of　merit　(ZT)　were　studied　by　varying　Ce　content　and　temperature.　Depending　on　Ce　levels,　both　P　and　N　types　of　thermoelectric　semiconductors　were　obtained.　MA-SPS　sintered　Ce1.0Co4Sb12　exhibits　the　highest　ZT　in　the　range　of　100　similar　to　500　degreesC　and　the　maximum　ZT　is　found　at　x　=　1.0　and　400　degreesC.