The purpose of this study was to investigate the changes in reducing depression and loneliness by using art therapy in the elderly living alone. The subject of this study was a 72-year-old woman without a husband after his death 35 years ago, and she has been living alone until now after her eldest son died of a heart attack seven years ago. The subject of this study complained of psychological difficulties such as depression and loneliness due to isolation from the outside world due to COVID-19, and the pre-test showed a high level of depression and high levels of loneliness. The art therapy program proceeded once a week, consisting of an introduction of 10 minutes, a work process of 40 minutes, and a wrap-up of 10 minutes. For data analysis, the Korean Geriatric Depression Scale and the Korean Loneliness Scale were used as pre-post tests, and K-HTP was used as a projective drawing test. The results of the study are as follows. First, art therapy for the elderly living alone was effectively applied to reduce depression and loneliness. Second, looking at the changes in emotions, behaviors, and works of the elderly living alone through art therapy sessions showed a positive change in which self-acceptance and reality recognition were improved through psychological recovery. Therefore, this study made it possible to improve psychological health by effectively applying art therapy to the elderly living alone.