This research is a hermeneutic phenomenological study in understanding the essential meanings of creative activities done by art psychotherapists. The participants of this study were eight art psychotherapists with more than 10 years of clinical field experience after graduating from a master’s degree. The project was conducted through procedures of selecting research participants, data collection and analysis and writings from August 2021 to April 2022. The results showed four categories and 14 topics designated according to the meaning of the participants’ creative activity experiences. The four categories were analysed as ‘process of healing’, ‘language for communication’, 'finding my uniqueness', 'pursuing art therapy in harmony with creativity'. In the overall context, creative activity was an existential act of life-healing for art psychotherapists. Through creative healing, art psychotherapists seek a freer and more balanced life by moving between the positions of creator and observer, and I feel unique by accepting my dynamic differences. This study provides insight into the art psychotherapist's experience of creative activity through the method of hermeneutic phenomenology. And the value of art psychotherapist's creative activities can serve as basic data to be combined and expanded in various fields.