This study is aimed to explore the issue of families that runs separate households both in Korea and in the other foreign countries. This study is limited to fathers of the households and studied the background of their choice to be the fathers who living apart from their families for a long time, how the fathers live by themselves, and how they maintain the relationships with their families. This study used the qualitive method in-depth qualitive data were gathered from eight wild geese fathers. Major find of this study were as follows. First, It was the fathers who suggested this fmaily style. They were effected by their past educational and environmental experiences. Second, Fathers leads free yet controlled life inside. However they struggle with loneliness and sexual desire. Instead of mingling with others, they usually spend time alone. Third, they evaluate their relationships between their spouses more positively than before they were separated. They consider education and economic support as their main roles as fathers rather than general care.