Context <p>There is growing recognition of the importance of measuring well-being on the basis of individuals’ capabilities, rather than focusing solely on health outcomes when evaluating health and social care interventions. The ICEpop Capability Measure for Adults (ICECAP-A) operationalizes this approach by assessing five core dimensions of capability well-being. Capability value sets for ICECAP-A have already been developed in the UK, the Netherlands, and Hungary.</p> Methods <p>This study aims to establish the first French value set for the ICECAP-A. We conducted an online, self-administered survey with a representative sample of the French general population (<i>N</i> = 3,546). Respondents completed a series of profile-case best–worst scaling tasks. Preferences for ICECAP-A attributes were analyzed using a scale-adjusted latent class best–worst choice model, which accounts for heterogeneity in choice behavior.</p> Results <p>A latent class model with four classes provided the best fit to the data. The first class displayed a strong preference for Autonomy. The second class expressed relatively balanced preferences across all capabilities. The third and fourth classes prioritized enjoyment and attachment, respectively; however, the fourth class did not value Stability. On the basis of these findings, a capability value set was estimated for the French population. At the aggregate level, Attachment and Enjoyment emerged as the most important capabilities, followed by Autonomy, Stability, and Achievement.</p> Conclusions <p>This study presents the first ICECAP-A value set for France. It can be applied in economic evaluations and policy decision-making to better reflect well-being beyond traditional health-related outcomes.</p>