The purpose of this study was to examine the relationship between mind understanding, popularity, and friendship of preschool children. A total 1444-and 5-year old children participated in this study. The children were assessed on false belief, emotion understanding, language skill, and popularity in peer groups. Their teachers rated the children's friendship qualities. Significant differences in mind understanding based on social status and friendship status were found. Popularity, number of mutual friend, PPVT, and positive interaction between friends were found to be significant predictors of children's mind understanding.