This research was conducted to investigate the effect of internet dependency on student- teachers' loneliness of Admiyaman University. The study also examined the differences in internet dependency and loneliness among students and teachers of Adiyaman University of Turkey. The standard questionnaire of Jung (1996) was used to measure the internet dependency. Also, to measure the sense of loneliness variable, the standard questionnaire of Rosell et al. (1980) was used. The reliability of the questionnaires was evaluated using Cronbach's alpha test, which included: Internet addiction questionnaire 0.91 and loneliness questionnaire 0.86. Questionnaires were distributed among the subjects (172 student-teachers of Adiyaman University). The results showed that internet dependency on student-teachers' loneliness of Adiyaman University had a significant positive effect (beta = 0.898). There was also a significant difference between the dependence on the internet and the feelings of the student- teachers of Adiyaman University of Turkey. Male student- teachers were more dependent on the internet, and female student-teachers also felt more lonely.