Background: In developing countries, chronic kidney disease (CKD) associated with anaemia is one of the major public health problems. With the progression of the disease, development of haematological abnormalities including iron deficiency increases. Renal anaemia may further increase the morbidity in these patients. Therefore, earlier detection and treatment of anaemia may be helpful in preventing the progression of the diseases and its other adverses (complications) outcomes.
 Materials and Methods : The study included estimation of the level of iron , some electrolytes with the determination of effect of body mass on all biochemical variables in the serum of healthy people the number (40) sample and people with chronic renal failure the (90) sample.
 Results: The Results indicate that the levels of serum iron ,Total iron-binding capacity (TIBC) ,Transferrin Saturation (T.S), haemoglobin , PCV, calcium and magnesium were Significantly Decreased in Patients group as compared with control and Significant Height in phosphate level (P≤0.01) in Patients group as compared .