An instrument measuring family and couple cohesion and adaptability was translated into French and used in a study aiming at documenting the contribution of the family in the rehabilitation process of adults having sustained a traumatic brain-injury. The instrument was administered to two samples in order of estimating internal consistency and construct validity (respectively 27 and 53 persons). As rehabilitation aims mainly at improving social participation, corelational analyses with a measure of social participation were also performed with the second sample. The results demonstrate that the translation has psychometric properties getting closer to the English initial version. On the other hand, the contribution of the family for the social participation stands out as significant but moderated. The nature of variables and the used scale can partially explain this result.