The aim of this research is to examine the mediator role of the authenticity in the relation between submissive behaviors and internet addiction. The research population was composed of 384 students in two secondary school located in Istanbul. The data were obtained by using the Authenticity Scale, Submissive Behavior Scale and Internet Addiction Scale. The frequency, arithmetical mean, standard deviation, Pearson correlation coefficient, regression and sobel test were used in analysis of the data. Correlation analysis showed that submissive behaviors is correlated positively with internet addiction and negatively with authenticity. The first step of the multiple regression analysis results showed that internet addiction significantly influenced the authenticity ([beta] = -0.26, t = -6.5, p <0.00). In regression analysis in the second step, authenticity was statistically significant in predicting submissive behaviors ([beta] = -0.44, t = -14.43, p <0.00). Regression analysis performed in the third stage showed that internet addiction was a significant predictor of submissive behaviors ([beta] = 0.40, t = 8.66, p <0.00). Finally, authenticity was included in the last model to determine its' mediating role between internet addiction and submissive behaviors. In this model, internet addiction and authenticity both entered the equation and the effect of the internet addiction on submissive behaviors decreased ([beta] = 0.24, t = 5.75, p <0.00). The sobel test was calculated if this decrease was significant and it was found that the authenticity had a partial mediator role in the relationship between submissive behaviors and internet addiction (z= 7.51, p<0.001).