Objective: The aim of this cross-sectional study was to examine and compare the prevalence of internet addiction and internet gaming disorder with examination of related sleep problems. Also identifying risk factors associated with them . Patients and methods: Data were collected from 60 students of Al-Azhar University. From randomly selected 6 different faculties. We found a high prevalence rate of Internet Addiction (IA) among them. This prevalence was higher than Internet Gaming Disorder (IGD) prevalence. Both of IA and IGD are inversely correlated to sleep quality. Theoretical faculties are at higher risk for IA and IGD. Middle Socioeconomic status (SES) of adolescents' parents is related to IA but not related to IGD. The study was approved by the medical ethics committee of Al-Azhar University Hospitals and a written informed consent was obtained from all patients. Results: According to the results of the Internet Addiction Test (IAT), 46.7% of the sample had moderate internet addiction, 3.3% had severe internet addiction and 40% had mild internet addiction. According to results of (IGD) Scale 50% were at risk to develop Internet Gaming Disorder (IGD)&13.6% were disordered. According to Pittsburgh Sleep Quality Index (PSQI), (60%) of the participants were suffering from poor sleep Quality. Conclusion: The current study has revealed a high prevalence rate of Internet Addiction (IA) among Al-Azhar university students. This prevalence was higher than Internet Gaming Disorder (IGD) prevalence. Both of IA and IGD are inversely correlated to sleep quality.