The present study investigated the associations between mothers’ levels of current depressive symptoms and mothers’ socialization of children’s positive affect (PA) regulation, assessed by mothers’ own PA regulation and responses to their child’s PA. The study included 96 mother-child dyads with children ages 7 to 12. Participants completed questionnaires examining emotion socialization constructs (i.e., PA, savoring, dampening) and participated in a mother-child discussion task about a positive event that the child experienced. Structural equation modeling was conducted while controlling for covariates (i.e., education level, household income, child age). Results indicated that mothers with higher depressive symptoms were more likely to dampen their own positive events and less likely to savor their own and their children’s positive events. Mothers with higher depressive symptoms also reported less PA in response to their own and their children’s positive events. In the discussion task, mothers with higher depressive symptoms used fewer PA-related words and were more likely to ignore their children’s PA-related words. These findings highlight the role of maternal depressive symptoms within PA socialization processes. This study may inform future research targeting specific emotion socialization techniques, such as savoring and dampening, in depression interventions for mothers and their children.