The aim of this study is to investigate pre-service teachers' Internet addiction in terms of gender, Internet accessibility, loneliness and life satisfaction. Statistical analyses were completed on the data by the 247 preservice teachers that filled the surveys completely. According to findings, pre-service teachers' level of loneliness and Internet addiction scores is low while their life satisfaction scores are high. Male participants are more addicted to the Internet than female participants. Also those, males and females, who had Internet access, had more tendencies to be addicted to the Internet. There is evidence to indicate a positive correlation between loneliness and Internet addiction, and negative correlation between life satisfaction and Internet addiction. Based on the results several different suggestions are made for continuing research in this field.