This study finds out the experiences and the meaning of a mother of twin children through art therapy for parent efficacy. The research participant is a mother of 6-year-old fraternal twins and received a total of 12 art therapy sessions for 90 minutes once a week from May 26 to September 8, 2022. The data consisted of recorded files and verbatim transcripts, in-depth interviews, photos of work process and the researcher's observation diary. These data were analyzed using session-by-session analysis and iterative comparative analysis. The conclusions of this study are as follows. First, the participants came to understand themselves by imaging and expressing their feelings and emotions exhausted by raising twins through art work. Second, they have a sense of emotional stability through purifying and accepting emotions by expressing emotions experienced in the raising of twins in art, Third, during the art work, the participant found a motivation for change to have a confidence by examining one's parenting attitude, resources and strengths. Fourth, in the process of the work, they recognized themselves changed and through the results, formed a positive self-concept while acquiring a sense of achievement and satisfaction. Therefore, art therapy for parenting efficacy enabled mothers with twin children to grow as healthy and stable caregivers through a change in their feelings and thoughts about raising twins. Based on these research results, the significance and limitations of this study were discussed.