The purpose of this study was to investigate how ETC-based group art therapy on affects the creative connection of elderly individuals with mild dementia. The subjects included a total of 16 senior citizens aged 65 or older at B daycare center for the elderly in A-gu, U city. All subjects had mild dementia, had never previously received group art therapy, and gave content themselves or via their families to participate in the study. The subjects were divided equally into the experimental and control groups, so each group had eight subjects. The research period spanned from September 2019 to February 2020. After excluding pre-and post-tests, the investigator administered a total of 20 sessions to the experiment group via one 70-minute session per week. Employed in the study was the creative link inventory. Additionally, the experiment results were quantitatively analyzed with the SPSS 24.0 program for Wilcoxon signed-rank test. The qualitative analysis focused on the changing process among elderly individuals with mild dementia based on the evaluation factors of art using the ETC structure and the components of creative links. The findings were as follows: First, the ETC-based group art therapy had statistically significant effects on creative link changes in the experiment group; Second, the experimental group reinforced and expanded their creative links and had reciprocal and integrated experiences with others on a spiritual level through physical self-awareness as the sessions of the ETC-based group art therapy proceeded. These findings demonstrate that ETC-based group art therapy can improve the creative links of elderly individuals with mild dementia. Based on these results, the implications and limitations of this study are discussed.