Purpose: Autistic camouflaging is a collection of strategies used to hide autistic characteristics. It can have serious consequences on autistic people's mental health and needs to be addressed and measured in clinical practice. The purpose of this study is to evaluate the psychometric properties of the French adaptation of the Camouflaging Autistic Traits Questionnaire. Methods: 1227 participants (744 autistic, 483 non-autistic) answered the French version of the CAT-Q in an online survey or on paper. Confirmatory factor analysis, measurement invariance testing, internal consistency analysis (McDonald's [omega]), and convergent validity with the DASS-21 depression subscale were conducted. Test-rest reliability was assessed on a sample of 22 autistic volunteers using intraclass correlation coefficient. Results: A good fit was found for the original three-factor structure as well as a good internal consistency, excellent test-retest reliability and highly significant convergent validity. Measurement invariance testing indicates however that the meaning behind items is different for autistic vs. non-autistic people. Conclusion: The French version of the CAT-Q can be used in clinical settings to assess camouflaging behaviors and intent to camouflage. Further research is needed to clarify the camouflage construct and whether reported measurement noninvariance are due to cultural differences or a true difference in what camouflaging might mean for non-autistic people.