Chronic kidney Failure, a progressive disease, includes both medical and biochemical features that damage kidneys and decrease their abilities to work effectively, this disease is characterized by a chronic disorders to both the innate and adaptive immune systems, generate a complex and not fully understood immune dysfunction. In the present study, (30) men suffering from chronic kidney failure with age in range (40-55) year and (30) healthy men within the same range of age were enrolled in this study. The aim of this study is to highlight the role of immunological aspect (IL-35), hormonal aspects (PTH), some functional proteins and immunological electrolytes in sera of chronic kidney failure (CKF) patients. Biochemical parameters were determined in the sera of both patients and (healthy) control group. Patients enrolled in this study were newly diagnosed, they have not taken any treatment related to any chronic disease. Blood samples were collected and biochemical parameters were measured in Al- Karama teaching hospital in Baghdad (except IL-35 which was determined in the private Al-Ghazalia Laboratory) from April to November 2015. Results have reported that IL-35 level was highly significant increase in sera of chronic kidney failure patients (35.035± 0.025) pg/mL compared with healthy group (23.331±0.031) pg/mL. As well, PTH level was highly significant increased in patients group (235.032±3.841) pg/ml compared with healthy control group (49.96±0.308) pg/mL. Hemoglobin level was highly significant decreased ( 9.696±0.056) g/L in patients with control group (15.332±0.067) g/dL. Determination of IL-35, PTH, Ferritin and Other biochemical. Parameters in sera of Iraqi Men with chronic kidney failure Rasha Zuhair Jasim and Samira Muajed Yaseen 58 Vol: 13 No:2 , April 2017 DOI: http://dx.doi.org/10.24237/djps.1302.151B P-ISSN: 2222-8373 E-ISSN: 2518-9255 Also, ferritin level was highly significant decreased in chronic kidney failure patients (164.0.68±7.818) ng/mL compared with control group (313.56±1.874) ng/mL. Moreover, albumin level was highly significant decreased (3.00±0.020) g/dL in patients compared with control group (4.928±0.039)g/dL. Bicarbonate level was highly significant decreased (17.412±0.117) mmol/L in patients compared with control group (25.044±0.072) mmol/L, sodium level was non significantly increased in patients (138.65±0.288) meq/L compared with control group (135.84±0.144) meq/L, potassium level was highly significant increased in patients group (5.420±0.0186) meq/L compared with healthy control group (4.700±0.113)meq/L, calcium level was highly significant decreased in patients (7.464±0.054) mmol/L compared with control group (9.628±0.614) mmol/L, phosphate level was significantly increased in patients (4.891±0.016) mg/dL compared with control group (4.552±0.014) mg/dL. The present study concludes that IL-35 is a strong biochemical marker for Iraqi men with CKF. Moreover, this study indicated the positive relationship between (PTH, Na+ , K+ , PO4 2- ) and chronic kidney failure, and the negative relationship between (Ferritin, albumin, hemoglobin, HCO3 - ) and chronic kidney failure in Iraq.