This study examines the mediating role of social media usage habits in the relationship between FoMO and nomophobia. 457 people were recruited to participate in the study. While 177 of them were male, the remaining 280 participants were female, and the participants' age ranged between 18 and 70. The average age of the participants was calculated as 30.81. The research hypotheses were tested by hierarchical regression analysis. In addition, the significance of the mediator variable was examined via Bootstrapping analysis. First, Pearson product-moment correlation analysis was performed to determine the relationship between variables, and it was found that there was a positive significant relationship between variables. The subsequent hierarchical regression analysis determined that social media usage habits played a partial mediating role in the relationship between FoMO and nomophobia. All findings were discussed in the light of similar research studies in the existing literature, and several suggestions were provided in the end.