Abstract: The present study aimed to evaluate calcium, potassium, albumin, protein, creatinine, urea, uric acid levels, and the level of total sialic acid in the sera of patients with chronic renal failure who had been infected with Hepatitis C virus and in the sera of patients with chronic renal failure, and compare them with healthy volunteers. A total of 90 subjects with age 25-55 years, were divided into three groups. G1 represents 30 patients with chronic renal failure who had treated by dialysis and infected with chronic Hepatitis C virus (positive group). G2 represents 30 patients with chronic failure who had been treated by dialysis (negative group), while G3 represents 30 healthy volunteers (control group). The results showed that the calcium, albumin, protein, and uric acid levels were decreased significantly (P≤0.05) in serum of G1 and G2 as compared with healthy group (G3). While levels of Potassium, creatinine, urea, and total sialic acid were significantly (P≤0.05) increased in serum of G1 and G2 as compared to G3. In conclusion patients with renal failure whom suffering from chronic hepatitis C, which they are serious diseases in Iraq; and although hemodialysis is an attempt to keep homeostasis in the patients, but it is not easy to retain them from the risk of mortality.