During its 37th congress in 1976, the CFDT made the commitment to fulfill the necessary conditions for a real integration of women workers in all its sites of decision-making. A policy promoting parity begins then, with some reluctance, and is linked to the re-centering policy of the CFDT. The question of gender ‘mixity’ is indeed at the heart of the reflection about CFDT syndicalism adaptation started in 1977. This reflection leads in 1982 to the Metz Congress where the CFDT, facing the failure of incentive measures, votes a resolution which lays down gender ‘mixity’ in the organization structures. The CFDT becomes the first trade union to choose pro-active measures through the establishment of quotas. However, even if the development of gender ‘mixity’ belongs to a union strategy for women, the debate it started reveals the difficulty for the CFDT, and more generally for syndicalism, to overstep a functioning which has a very masculine pattern.