Recently the normal values of pulmonary test parameters [1], level of hemoglobin [2] and glycated hemoglobin [3-5] in Sudanese have been found to be different from the international reference values. The study aimed to compare the values of serum electrolytes (Na+, K+, Ca++) level in Sudanese with the international values. 100 normal healthy adult Sudanese with aged between 18 and 65 years (50 males and 50 females), who were nonsmokers, not Known to be hypertensive or diabetic , have no renal or thyroid problem, living in Khartoum city were included in our study. The data was collected using a structured questionnaire then the levels of Na+, K+ and Ca++ were measured. In the males group the means of Na+ level range was 129-141 mEq\dl, K+ was 3.6- 8.2 mEq\dl while Ca++ had a level range of 7.2- 12.2 mEq \dl. In the females group the means of Na+ level was 134.94 ± 3.86mEq/dl; K+ was 4.34 ± 0.46 mEq/dl while Ca++ had a level of 8.95 ± 0.84 mEq /dl. There are slight difference from the international ranges, yet a further bigger scale study is needed to verify those findings.