Background: Patients with chronic kidney disease are characterized by low levels of physical functioning, which, along with low biopsychosocial Functional activity, predict poor outcomes in those treated with hemodialysis. Aim: To assess of functional health status for patients undergoing hemodialysis. Design: Descriptive research design. Setting: Hemodialysis unit at Om-Alkosur University Hospital. Sample: A purposive sample of 100 adult patients. Tools (1): Personal characteristics and medical data and (2): Biopsychosocial functional health status assessment sheet which composed of 3 parts; I. physical, II. psychological and III. social health status. Results: Majority of the studied patients had a partially physical function, a moderate psychological function, mild social function and totally had warning zoon. There was no statistically significant difference between totally biopsychosocial Functional and their demographic and clinical data there was statistically significant difference except regarding residence and duration of dialysis (0.002 and 0.001 respectively). Conclusion and Recommendations: Functional health impairment is a major obstacle among hemodialysis patients. There is need for collaborative approach to improve function health status for patients undergoing heamodialysis.