Abstract: The keratin composition of som Primate hairs is analysed by SDS- polyacylamide gel electrophoresis(SDS-PAGE)and then is scaned for the electrophoretic gel plate with laser densitometer.The results show that the different molecular weight of keratin composition of human hair is obviously different from those of other Primate hairs.Also, the keratin composition of hair is difference among different Primate. Based on this finding it can be concluded that the race of Primate is identified with SDS-PAGE in the lever of hair's molecular.