Open access. Basic parenting research reveals that child mental health is associated with optimal parenting, which is composed of three key dimensions (structure, affiliation and autonomy support). The present study aims to test the efficacy of the parenting program “How to talk so kids will listen & listen so kids will talk” (French version), thought to address all of these dimensions, in promoting children’s mental health. We predict that the How-to Parenting Program will promote child mental health by fostering optimal parenting.