The present study investigated the parenting alliance`s mediating effects on the relationship between adult attachment and marital satisfaction. The participants were 157 married parents of young children(77 men and 80 women). We used the Experiences in Close Relationships Scales (Kim & Lee, 2005), Quality Marriage Index (Jang, 2001), and Parenting Alliance Inventory (Abidin, 1988) and analyzed data using descriptive statistics, Pearson`s correlation, and regression analysis, via SPSS PC program(17.0 version). The results revealed that the effects of married males` avoidant dimension on marital satisfaction were partially mediated by their wives` parenting alliance. The effects of married females` anxious dimension on marital satisfaction were totally mediated, and the effects of married females` avoidant dimension on marital satisfaction were partially mediated, by their husbands` parenting alliance. In conclusion, the parenting alliance mediates the effects of adult attachment on marital satisfaction in couples with young children.