In order to control the grain size of Cu-15.0Zn-8.1Al shape memory alloy, the spark plasma sintering (SPS) technique was applied. The sintering processes were carried out under different atmospheres with a different powder size. The sintered bodies were denser under the Ar+4%H2 gas atmosphere than under the 100% Ar gas. By using the small-sized powders, the fine microstructure with average grain size of 2~3 was obtained. With the large-sized powders, the single martensitic phase was observed with the average grain size of 70~72 . When the starting powders with different sizes were mixed, it is confirmed that the average grain size of the manufactured alloys was 15 , but the distribution of grain size was not uniform.