To provide a thermoelectric material manufacturing method by a spark plasma sintering method, which can inhibit decrease in electrical conductivity σ while decreasing thermal conductivity κ.

In a thermoelectric material manufacturing method, a sintering temperature in a spark plasma sintering method is set at a temperature lower than a melt point of a thermoelectric material powder by 300°C or over. For example, in the case where the thermoelectric material powder is a semiconductor including at least one element selected from a group consisting of Bi and Sb, and at least one element selected from a group consisting of Te and Se, the sintering temperature is selected to be 200-300°C. Moreover, the sintering time is selected to be 4-10 hours. It is preferable that a sintering pressure is 40-100 MPa and an average particle size of the thermoelectric material powder is 30 μm or under.