The purpose of this study was not only to verify actor and partner effects of marital commitment on marital satisfaction through APIM analysis but also to present basic material needed in marital counselling and education, seeking reinforcement of marital relation and divorce prevention. The subjects of this study were 832 couples who have children attend in 25 educational institutions such as children education institute, elementary school, middle school, high school, and college or university in 5 cities. In the result of this study through APIM analysis, the results indicated that husband`s commitment perceived by wife had a effect on wife`s marital satisfaction and wife`s commitment perceived by husbands had a effect on husband`s marital satisfaction, which showed the projection of the actor effect. Also, it revealed that husband`s commitment perceived by wife had an effect on husband`s marital satisfaction and wife`s commitment perceived by husband had an effect on wife`s marital satisfaction, which showed the partner effect that commitment had on marital satisfaction, but the actor effect was more influential than the partner effect. In other words, the study shows that commitment had a lot of effect on marital satisfaction, which meant that the projection was very influential.