Authenticity is a basic personality characteristic that has an important influence on both the psychological and social lives of individuals. Subjective vitality also assumes a facilitative role regarding positive mental health indicators. Therefore, the purpose of this study is to investigate the predictive role of authenticity on subjective vitality. The participants consisted of 329 university students who completed the Authenticity Scale as well as the Subjective Vitality Scale. The findings of correlation analysis showed that subjective vitality was negatively correlated with two sub-factors of authenticity: accepting external influence and self-alienation. Conversely, the authentic living factor of authenticity was positively related to subjective vitality. In addition, the results from structural equation modelling showed that subjective vitality was positively predicted by authentic living, whereas it was negatively predicted by accepting external influence and self-alienation. These findings, discussed in light of the related literature and dependent recommendations, illustrate the predictive role of authenticity on subjective vitality.