[en] We report the synthesis of Nd-filled and Fe substituted p-type Nd_xFe_3.2Co_0.8Sb₁₂ (x = 0.5, 0.6, 0.7, 0.8, and 0.9) skutterudites by the solid-state reaction method. The influences of Nd filler on the electrical and thermal transport properties are investigated in a temperature range from room temperature to 850 K. A lowest lattice thermal conductivity of $0.88\mathrm{W}\cdot <!--\; ???\; -->{\mathrm{m}}^{-<!--\; ???\; -->1}\cdot <!--\; ???\; -->{\mathrm{K}}^{-<!--\; ???\; -->1}$ is obtained in Nd_0.8Fe_3.2Co_0.8Sb₁₂ at 673 K, which results from the localized vibration modes of fillers and the increase of grains boundaries. Meanwhile, the maximum power factor is $2.77\mathrm{m}\mathrm{W}\cdot <!--\; ???\; -->{\mathrm{m}}^{-<!--\; ???\; -->1}\cdot <!--\; ???\; -->{\mathrm{K}}^{-<!--\; ???\; -->2}$ for the Nd_0.9Fe_3.2Co_0.8Sb₁₂ sample at 668 K. Overall, the highest dimensionless figure of merit zT = 0.87 is achieved at 714 K for Nd_0.9Fe_3.2Co_0.8Sb₁₂. (special topic — recent advances in thermoelectric materials and devices)