In the current study, we investigated the contribution of attachment and parenting to emotion regulation among preschool children in Palestine. Specifically, we set out to test the hypothesis that both parenting styles and patterns of attachment would be associated with children’s emotion regulation abilities. The sample comprised 150 children from 10 public preschools in Northern Palestine. The preschoolers’ levels of emotion regulation were found to be associated with their parents’ parenting styles. More specifically, permissive and authoritative parenting styles were positively associated with emotion regulation and authoritarian and uninvolved parenting styles were negatively associated with emotion regulation. In addition, a statistically significant positive correlation was found between secure attachment and emotion regulation.