The relation between children's guilt proneness and theory of mind (???) was examined in children (? = 96) aged 7- to 11-years. Guilt proneness was assessed with a self-report scenario-based measure and ToM was examined with a battery of first-order and second-order mental-state tasks. Hierarchical regression analysis revealed that second-order, but not first-order, mental state understanding, predicted children's guilt proneness. Age and gender did not have a moderating influence on this relation. These results add to research investigating the significance of ToM for children's moral emotions.