This study was to see what art therapy majors in the master’s course experienced while practicing art therapy for the elders with dementia, to explain the meanings and essence of their experiences, and to give an in-depth understanding of them. For this study, Max van Manen’s hermeneutic phenomenological methodology was applied and data were collected from six participants, who were students majoring art therapy having experienced practicing therapies for the elders with dementia. The data analysis drew a total of 6 themes and 19 sub-themes, and the essential themes were as follows: ‘With perplexed mind, prepared a session with an elderly who was diagnosed with Alzheimer’s disease’, ‘Even though thoroughly prepared, had a hard time because of the mistakes’, ‘Experienced that art therapy treatment of senior with Alzheimer’s disease is also a interacting relationship’, ‘Realized what art therapy treatment means to them’, ‘Tried to understand fully of themselves as well as the diagnosed seniors’, ‘Stepped up a level as an art therapist equipped with professionality dealing with seniors with Alzheimer’s disease’. Students majoring art therapy realized that they lacked a deep understanding of the field and dementia; they made up for the lack and repeated the efforts to improve their competence as a therapist and make self-reflection. This study is significant in that on-site practice is a crucial part of art therapy education and that art therapy for the elders with dementia needs to make a specialized, systematic approach.