Background: The hip condition known as slipped capital femoral epiphysis (SCFE), which affects adolescents between the ages of 9 and 15, is frequent. The exact cause is still mostly unclear, but a mix of hormonal and mechanical elements is most likely to be responsible. Objective: The present study aimed to evaluate the functional and radiological outcomes of surgical treatment of stable and unstable slipped capital femoral epiphysis with screw fixation. Patients and methods: A prospective clinical study that included 18 cases (21 hips) with slipped capital femoral epiphysis at Zagazig University Hospitals. Patients were classified as stable and unstable using the Loder criteria. All patients were followed up in the outpatient clinic as follow: after 2 weeks to follow up on the wound and removal of the sutures. After 3 and 6 months, patients were followed up clinically and radiologically. Results: The SCFE was found on the left side in 50% of the cases, the right side in 33.3%, and bilateral in 16.7%. The average weight of the studied group was (54.2±8.9) ranging from 43 to 69 Kg. According to the stability classification, there were 15 patients are stable SCFE, and 3 patients are unstable SCFE. Regarding the severity 13 cases were mild and 8 cases were moderate. The follow-up time ranged from 5 to 7 months. Our findings' satisfactory outcome was the majority with 88.9%,12 cases (66,7%) obtained excellent results 4 cases (22.2%) had good results, and unsatisfactory 11.1% (2 cases one of them obtained fair results). Conclusion: Treatment with screw fixation in stable and unstable slipped capital femoral epiphysis gives good results. However, it highlights the fact that an unstable SCFE is more likely to generate a poorer outcome.