Objective: The purpose of this study was to examine children’s disclosure to parents in different domains of their daily activities. Methods: The participants were 340 children(100 kindergarteners, 120 3rd graders and 120 6th graders in elementary school) and their mothers in Seoul and Gangwon-do, Korea. The data was analyzed with one-way ANOVA, paired t-test, and MANOVA. Results: First, 3rd graders and 6th graders experienced more daily activities than kindergarteners in most domains. Second, 3rd graders disclosed more than kindergarteners and 6th graders in most domains. The response of mothers with 3rd graders was most similar to their children’s response about children’s disclosure to parents. Third, the reasons for nondisclosure of children were different according to domains. The reasons for nondisclosure of children that mothers perceived were different from those of their children, especially in the school(institute)-related domain.?Conclusion/Implications: The results of this study indicated that the aspects of children’s disclosure to parents were different according to domains of their daily activities based on developmental stages. Mothers perceived their children’s disclosure differently compared to their children. The results suggest that it is necessary to approach children’s disclosure to parents based on domains of daily activities and developmental stages.