Multiple determinants of parental burnout have been identified, among which two indexes of non-supportive coparenting play a central role: low endorsement of the partner’s parenting, and high exposure of the child to interparental conflicts. It is, however, unclear whether these coparenting dimensions play a role for both mothers and fathers, and if this role may be more important for parents who have a high interdependent self-construal. We surveyed a sample of upper-middle-class heterosexual parents living in a dual-earner family arrangement (152 mothers, 101 fathers) with 0- to 12-year-old children living at home. Parents answered questionnaires about burnout, sociodemographic variables, coparenting, self-construal independence and interdependence, and child-related variables. Generalized linear model analyses showed that (i) burnout is higher in mothers than in fathers; (ii) for fathers, burnout is associated with a higher exposure of the child to interparental conflicts; (iii) for mothers, it is associated with a younger age of the youngest child, a higher exposure of the child to interparental conflicts, a lower endorsement of the partner’s parenting, and a higher self-construal interdependence; and (iv) there is no moderation effect of interdependence on the link between the coparenting dimensions and burnout.