The purpose of this study is to find out the formulation process of co-parenting types after divorce. Based on qualitative research, the research method uses in-depth interview. The subjects of the interviews are 18 divorced mothers and 6 children who were their children. Data analysis uses grounded theory approach which is proposed by Strauss & Corbin(1990). In particular, the data is analyzed by the paradigm model of grounded theory. The major findings of this study are as follows. As a result, 17 categories, 34 sub-categories, 118 characters and dimensions of categories, all 168 concepts were conceptualized. The paradigm model of grounded theory composed 6 stages those are called \'causal conditions\', \'phenomenon\', \'context\', \'intervening conditions\', \'interaction\', and \'consequences\'. The result explains 4 co-parenting types after divorce. First, the \"cooperative type“ means comfortable father-child relationship under interparental cooperation agreed and supported by mother, \"unconcern type” in which mother unconcerns meeting between father and children, “conflictual type\" in which mother expresses negative response to children about their father and meeting, \"cut-off type\" in which father is excluded from the children. Generally, in \"cooperative type\", there are few serious difficulties in children\'s adjustment, with more open communication and less conflict between the mother and children. However, in \"conflictual type\", children are apt to show affective and behavioral problems. Children feel being caught in the middle of the parents and royalty conflict. This research found the diverse process factors that effect the adjustment of children of divorce, and understands the divorce as a process, not as a one time event. Thus, clinical intervention should be considered according to divorce process and co-parenting types.