Background: Internet addiction is an overuse of the internet leading to impairment of individual's psychological state both mental and emotional as well as their occupational and social interactions, so it requires adequate assessment for detection and prevention. Aim of study: Was to evaluate the effect of psycho- educational intervention program on psychosocial problem of internet addiction among nursing students. Design: Quasi-experimental design (pre-test, post-test) was utilized to conduct and achieve the aim of study. Setting: This study was conducted at Faculty of Nursing of Benha University. Sample: A purposive sample of 251 students from fourth grade, who used the internet more than six hours per day. Tools of Data collection: Three tools were used: I: Structured interviewing questionnaire it was divided in three parts: Socio-demographic data, knowledge about internet use among nursing students and knowledge about the internet addiction, II: Internet addictive behavior scale, III: Depression Anxiety& Stress Scale (DASS). Results: Nearly half of the studied student had unsatisfactory knowledge preprogram whenever most of them  had satisfactory knowledge post program implementation, more than half of the studied students had moderate level of addiction pre-program implementation, while minority of them had sever level of addiction post program implementation and nearly two thirds of studied students had moderate level of psychological problems (depression, anxiety and stress) pre-program implementation, while minority of them had severe level of psychological problems (depression, anxiety and stress) post program implementation. Conclusion: The psycho-educational intervention program had a positive effect on reducing the psycho-social problems of internet addiction among nursing students. Recommendations: Continuous monitoring and evaluating student's addictive behavior for early detecting and solving problem.