The research was conducted in order to determine the levels of nomophobia of teachers working in secondary schools. The universe of the research consists of 988 teachers working in official secondary schools in Altindag district of Ankara province in 2023-2024. with the sample calculation with 95% reliability and 5% margin of error, 298 teachers are required to participate in the research. 303 teachers selected by the easily accessible sampling method from within the universe constitute the sample of the research. Turkish Nomophobia Scale (NMP-Q in Turkish), which was adapted to Turkish by Yıldırım, Sumuer, Adnan and Yıldırım (2016), was used to collect the data of the research. Percentage, frequency, average, standard deviation, etc. on the obtained data. in order to determine the differentiation with descriptive analyses, t-Test and ANOVA analyses were applied. The results obtained in the research are as follows: Teachers are nomophobic at a high level. The gender, seniority and graduation of teachers do not affect their levels of nomophobia.