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Objective: The aim of the study was to determine the validity and reliability of Turkish version of Fear of Missing Out (FoMO). Methods: This methodologic study was carried out in two faculty of Eskisehir Osmangazi University. Our study group consisted of 200 students over the age of 18. Translation process was conducted in accordance with the literature. Opinions of fifteen specialists were asked to examine the construct validity. Content Validity Index (CVI) coefficient of FoMO Scale was 0.62. Participants sociodemographic characteristics about their social media usage, FoMO Scale and Problematic Mobile Phone Use (PU) were conducted. Results: Of the participants 52.5% was female. The mean of age was 21.4±3.0 years. According to factor analysis, factor loading ranged between 0.36-0.77 and consisted of single factor structure. Cronbachs alpha coefficient of the scale was 0.81. Reliability coefficient of test-retest was 0.81. The scale was statistically and positively correlated with the PU with confirming concurrent validity. The statistically significant relationship was found between the number of social media account, the frequency of checking Facebook and Twitter and the total point of FoMO Scale. There is no significant relationship between the frequency of checking his/her internet for looking personnel e-mail or calling and total point of FoMO Scale. Conclusion: FoMO Scale is a valid and reliable instrument to evaluate the FoMO among university students. Additionally, we emphasized that further research is needed on different and larger groups by using the scale. [Anadolu Psikiyatri Derg 2016; 17(0.100): 53-59]