Aim: to determine effects of early mobilization protocol on patient's outcomes post cardiac surgery. Methods:   A Quasi- experimental design was utilized with a convenience sample of 80 recently admitted in adult postoperative cardiac surgery intensive care unit in Beni-Seuf university hospital. Data were collected using 2 tools patient assessment data and Post cardiac surgery outcomes assessment record Results: As regards to physiological parameters as heart rate, respiratory rate, mean arterial blood pressure, temperature and pain, there was a significant difference between control and study; furthermore there was a significant difference in sleep quality, post-operative complications and length of stay between control and study group. Conclusion: The present study showed that early mobilization and physical exercise post cardiac surgeries have major positive effect on patients' outcomes. Recommendations: Early mobilization is achievable and has major benefits in post cardiac surgery patients. Further research studies are recommended to detect efficacy of early mobilization in different patient groups.