Background: Coronary artery disease is a major cause of morbidity and mortality throughoutthe world. Health educational intervention can improve Physical function of CAD patients. Aim ofthis study was to evaluate effectiveness of educational intervention on physical function amongcoronary artery disease patients. Research Design: A quasi experimental research design wasutilized. Setting: This study was conducted in coronary care units and outpatient cardiac clinic atBenha University Hospitals. Sample: A purposive sample of 86 patients with coronary arterydisease was included in the study. Tools of data collection: Two tools were used to collect the data;1) interviewing questionnaire included patients` knowledge and physical function assessment. 2)Practical Checklist. Results: The highest percentage were male more than 50 years, 73.3% havingchronic disease mainly hypertension. There were statistically significant difference in patients’knowledge, physical function and patients’ practice (p <.001).Conclusion: The study demonstratedstatistical significant improvement of patients' knowledge, physical function and practices postprogram phase compared to preprogram phase. Recommendations: Physical function for patientswith CAD should be evaluated during the plan for treatment of patient with CAD by trained nurse.