Background: Hip joint replacement is the replacement of a critically injured hip with an artificial joint. It is an orthopedic procedure which aims to improve the management of diseases of the hip joint that have not responded well to conventional medical treatment or lifestyle changes. Aim of study: evaluate the effect of the nursing intervention for older adult Post hip joint replacement on their activity of daily living.

Research Design: A quasi -experimental design was utilized in this study. Setting: The study was conducted at outpatient orthopedic clinics in El Helal hospital.

Study sample: A purposive sample was collected; it consisted of 126 older adults with HJR attending orthopedic out-patient clinic, both genders, from one to three months after surgery Tool: one tool was used in this study. Tool I: Structured Interviewing Questionnaire included six parts I) Demographic characteristic of the patient, II) Subjects medical history(Past medical history, current medical history). III: Patient's knowledge about factors leading to hip joint replacement IV) Patients reported practice. V) Katz Index of Independence in Activities of Daily Living. VI) Home environment as reported by the elderly related to facilitation.

Results: The age of older adults with hip joint replacement ranged between 60 - < 65 and 58.7% of them were males. 57.1% of them were unable to mobile,88.9% diagnosed their disease through medical examination.78.6% of the studied older adults had unsatisfactory level of total knowledge at pre-intervention program compared with, 60.3 % of them had satisfactory level of total knowledge at post-intervention program about hip joint replacement. Moreover, there was a highly statistically significant difference in all items of the studied older adults' reported practices about daily living activity pre and post intervention program.

Conclusion: In conclusion hip replacement surgery is most common among the older adults between rang 60-<65 years. It is more prevalent among males more than female, Implementation of the nursing intervention had affect positively on knowledge, practice and activity of daily living of older adult with hip joint replacement surgery.

Recommendation: A simplified and comprehensive booklet should be available for all elderly with hip joint replacement which include a clear, brief and simple explanation about causes and complications about hip joint replacement and how to deal with these complications. Utilize Internet to present different educational programs to raise older adult’s awareness regarding different health issues such as accident prevention for falling and fractures, as well as, the precaution after hip joint replacement... Further research studies about normally changing of age process, preventive measures and coping measures. Regular follow up of patient with hip replacement to evaluate health related daily activities to detect any health problems early.