Background: The Life Engagement Test was developed by Scheier et al. (2006) to assess individuals' engagement in life through the importance they give to their life goals. The purpose of this article is to present the French validation of the Life Engagement Test (LET-F). Methods: The LET was first translated into French using the back translation method. The French version of the LET was then offered to 479 people aged 13 to 72. All of them responded to the 6 items of the questionnaire on a 5-point Likert scale. Nomological validity was performed using questionnaires from the original version: the Satisfaction with Life Scale, the Generalized Self-Efficacy Scale and the Hospital Anxiety and Depression Scale.Results: Confirmatory factor analysis validates the unidimensionality of the scale. Multi-group invariance analyses also show invariance for gender but not for age. Finally, the nomological validity is satisfactory and comparable to the original version.Conclusion: The French version of the LET (LET-F) is an instrument with sufficient psychometric qualities to be used in clinical or research settings. For clinicians, the LET-F can be used as a tool to assess a patient's engagement in life in the aftermath of life events such as illness or grief. For researchers, given the brevity of this questionnaire, it can be easily combined with other instruments, thus allowing for broad-spectrum investigations of well-being behaviors.