[en] In the paper, ternary thermoelectric material AgSbTe₂ was prepared by high-pressure and high-temperature (HPHT) technique. Near single phase AgSbTe₂ was obtained using normal stoichiometric powder mixtures which were indexed by powder X-ray diffraction. The dependence of transport properties for AgSbTe₂ on synthetic pressure was studied at room temperature. With the increase of synthetic pressure, the electrical resistivity and Seebeck coefficient of AgSbTe₂ decrease while the power factor increases, and the maximum value reaches 10.3 μW cm^-1 K^-2 at the synthetic pressure of 5.2 GPa. The results show that the HPHT offers to a potential processing route to produce single phase ternary thermoelectric material AgSbTe₂, which is helpful to improve its thermoelectric properties