CKP isoenzymes have a high level of efficaciousness as diagnostic and prognostic aids in various diseases. There is not any report on the total activity of CPK of non-human primates, let alone CPK isoenzyme patterns, in Korea. In this study, total activities and isoenzyme patterns of CPK were measured to obtain their reference values in domestically reared common marmosets, crab-eating macaques and Japanese macaques. We observed remarkable different values of serum total CPK from the primates used in this experiment. Serum CPK activities of Japanese macaques and crab-eating macaques were 275.8$pm$158.1 IU/l and 396.7$pm$697.4 IU/l, respectively, whereas those of common marmosets showed much higher value of 618.8$pm$1,117.6 IU/l. In all common marmosets and crab-eating macaques, only CPK$_3$ ws observed. In five out of eight Japanese macaques, CPK$_3$ was the sole fraction but two animals showed CPK$_1$ and CPK$_3$ isoenzymes, and the remaining one had CPK$_2$ and CPK$_3$ fractions. There were some discrepancies in the pattern and ratio of isoenzyme fractions in Japanese macaques. In conclusion, values such as CPK and CPK isoenzyme patterns of investigated for the first time form non-human primates reared in Korea, could be reference values for the optimal diagnosis and therapy diseases of the corresponding animal species.