For this study, two families were selected who had high depression, anxiety, and helplessness and difficulties in forming social relationship in present life because of bereaved experience, and family art therapy was conducted with them. The purpose of the study was to address family members’ individual trauma with a focus on the mourning of the whole family and to test the effects on their emotional stability by letting their dead family members go from their lives. Case 1 was a single-parent family consisting of a mother and two daughters in the first and second grade of a middle school located in G City. Case 2 was the family of a male student in the third grade of the middle school located in G City. His father was a temporary construction worker and lived apart in a rural area. His aunt raised the male student and his two elder sisters. FSDT, KFD, PIA were used to examine the effects of family art therapy on mourning and emotional stability. FSDT, KFD were compared between pre-test and post-test to analyze data. Qualitative analysis was performed when there were changes of mourning and emotional stability changes of PIA. This study used an approach to families with common trauma rather than an approach to individual trauma on bereavement of a family member. The result could increase understanding between family members, sustain positive power, and help family members’ internal healing and individual growth.