For many women, the postpartum period is a particularly vulnerable time to experience body image dissatisfaction. We aimed to examine the impact of social media usage frequency in the context of postpartum body image dissatisfaction and eating disorder psychopathology. We therefore empirically tested a hypothetical model assuming that social media usage influences postpartum body image dissatisfaction and eating disorder psychopathology via multiple mediation through appearance-related social comparisons and thin ideal internalization.