The purpose of the survey was to study the relationship between the rate of addiction to internet with academic motivation and social development. The method of the research was descriptive correlation. The statistical population included all high school students of Mazandaran province which consisted 99328 ones. 417 students were selected as statistical sample. Yang’s internet addiction questionnaire, with a reliability index of 0/95, Wailand’s standard growth development questionnaire with a reliability index of 0/92 and a researcher-made questionnaire with a reliability index of 0/86 were used as the measurement tools. Formal and content validity of the tools were examined and confirmed by the related experts. The data were analyzed by both descriptive statistics including frequency and percentile tables, mean and standard deviation, and by inferential statistics including Pearson correlation coefficient and t test. The results showed that there was no significant difference between boy and girl students in urban and rural areas, but there was a significant reverse relationship between internet addiction and academic motivation among urban and rural students. There was also a significant reverse relationship between internet addiction and academic motivation between boy and girl high school level students in urban and rural areas.
