The purpose of this study was to explore the relationship of marital violence and marital unstability. A total of 192 marital couples in Pusan completed a structure questionnaire. The major finding were as follows : 1. Husbands and wives reciprocally inflicted psychological aggression and physical violence. 2. Violent couples who were high level of marital unstability had worse family system function than violent couples who were low level of marital unstability. Violent husbands who were high level of marital unstability were disengaged and chaos family system. 3. Husbands inflicted violence toward their wives when husbands had the contempt of communication style, and their family function were disengaged level. Wives inflicted violence toward their husbands when wives had the contempt of communication style. Couples who had high level of marital unstability were more likely to violent and were disengaged level on Circumplex Model.