The aim of this study is to examine the relationship between student nurses' nomophobia levels and obesity and self-esteem. This study is a descriptive-correlational type study. This study conducted 607 nursing students. Data were collected with "Personal Information Form," "Nomophobia Questionnaire (NMP-Q)," and "The Self Esteem Rating Scale-Short Form." As a result of the research, it was determined that the students had moderate nomophobia. There was no significant relationship between nomophobia and obesity and self-esteem. It was determined that especially when they are bored, the rate of using smartphones is high, and the use of smartphones harms their lives. More studies are needed to examine the relationship of nomophobia with students' body mass index and self-esteem. © 2020 Wiley Periodicals LLC.