This study was conducted to examine the role of emotion-focused coping as mediator of the relationship between personality traits and the level of problematic internet use. A total of 174 participants in the age range 18-29 (M = 23.1, SD = 2.7) have completed online questionnaires. The instruments used were Generalized Problematic Internet Use Scale 2 (GPIUS2), Big Five Inventory 44, and Brief COPE. The findings of this study show that emotional-focused coping did not work as a mediator in the three personality trait relationships (neuroticism, extraversion, & openness) with problematic internet use. Nevertheless, this study found that the direction of the relationship between the three variables has aligned with previous theories and findings. Allegations about the possibility of no significance are discussed.