The present cross-sectional study tested the affect regulation model of disordered eating for women in the postpartum period, whereby disordered eating is used to cope with psychological distress. Two hundred and two women who had given birth in the last two years completed an online survey of self-report measures of study variables. Path analyses supported the primary hypothesis: negative affect mediated relationships between body dissatisfaction, dysfunctional maternal beliefs, negative components of self-compassion and disordered eating behaviours, particularly binge eating. Results suggest that negative affect plays a central role in postpartum disordered eating. Interventions to address maladaptive emotion regulation strategies, specifically targeting body image distress and self-critical maternal thoughts may improve eating behaviours for this population.