Phubbing is a phenomenon that is often found in late adolescents. This is an important concern for researchers, especially regarding boredom and fear of missing out on moments in smartphone users. This study aims to determine the effect of Boredom Proneness and Fear of Missing Out on Phubbing. This study involved 150 late adolescents who use smartphones and are active on social media. Data collection using a questionnaire. The analysis technique in this study used multiple regression tests. The results of this study indicate that there is Boredom Proneness and Fear of Missing Out on Phubbing by 79.1%.