The aim of this study is to find out of the extent to which family social support and internet addiction affect on academic achievement in students at the X University. This research using multiple linear regression analysis. The subject for this study is students from X University. Samples taken are 100 responders. Female responders are 65 people and male responders are 35 people from several faculties. Internet addiction trends are measured by the use of internet addiction test scale. Family social support is measured by the use of family social support scale. Research shows that family social support and internet addiction simultaneously affect together on academic achievement (p = 0.008 p <0.05) and in the amount of 9,4% (R square = 0.094).