This study aimed at understanding the experience in deciding for childcare of unmarried lone mother and searching for intervention methods through in-depth examination of the essence of the experience. To achieve this, the Colazzi analysis of phenomenological research was applied. The subjects of study were 7 unmarried lone mothers in early age of the twenties and thirties, who resided in an institution for unmarried lone mothers. An in-depth interview was held individually with them with question of "What is the experience in deciding for childcare as a unmarried lone mother" twice on the average from Nov. 2003 to Feb. 2005. The results found that a unmarried lone mothers' experience in childcare meant 'resurrection' through analyzing 22 themes and 7 theme clusters(confusion due to pregnancy, harsh feeling for reality suffering alone, feeling of love for a baby, mental conflict about childcare, decision toward childcare, firm in decision, hope for resurrection). Although the results of this study have the limitation of generalization due to phenomenological study, it will contribute to accepting and understanding mother-and-child families as one type of family rather than regarding them as being difficult or alienated in family and society, to recognizing the need of taking back their rights, and to suggesting intervention methods for unmarried lone mothers.