This study aimed to investigate the impact of Internet addiction on psychiatric symptoms among Greek university undergraduate students. The study was conducted among 1324 students. Participants completed a sociodemographic questionnaire, Internet Addiction Test and Symptom Checklist-90-Revision (SCL-90-R). Questionnaires were provided online. T-test and Logistic Regression Analysis were used to compare psychiatric symptoms between Internet addicted and non-addicted students.