To the literature, it is seen that there are some studies demonstrating the relationship between FOMO and problematic smartphone use, or FOMO and smartphone addiction. However, no study has yet been found that explains the relationship between nomophobia and FOMO. Therefore, the aim of this study is to examine the effect of FOMO on nomophobia by investigating the relation between nomophobia and FOMO. No mobile phobia, i.e., nomophobia, is about a contemporary fear of not having a chance to communicate via mobile phone, while Fear of Missing Out, i.e., FOMO, is known to be correlated with the problematic use of social networking sites (SNSs). This descriptive study is a correlational study adopting a correlational survey model. The data were collected from a convenient sample of 538 university students via nomophobia questionnaire (NMP-Q) and FOMO scales as data collection tools. The results show that a positive moderate level of the relationship was found between Nomophobia and FOMO levels.