This study aimed to analyze and compare the reasons of patients to terminate the comprehensive treatment by dental students. A total of 300 patients in a comprehensive dental care clinic were enrolled. Self-administration questionnaires were used to collect data. Descriptive statistics were used to analyze the general data, past dental treatments, and the reasons of the patients to terminate the comprehensive treatment by the dental students. The c² and independent t-test were used to compare the statistically significant difference between walk-in and referred patients. The significant level was set at 0.05. The open-ended questions were analyzed by content analysis and presented with frequency. 183 patients were walk-in patients whereas 117 were referred patients. The main reason to terminate the comprehensive treatment was the duration of the visit (mean=1.25, SD=1.40), followed by the frequency of treatment without progression (mean=1.18, SD=1.46) and the complexity of treatment procedures (mean=1.11, SD=1.36). Comparing the walk-in patients and referred patients, the mean score of referred patients were higher than walk-in patients for all reasons except waiting duration (p=0.537). The patients’ suggestion that the authors used the open-ended question found that the patients were satisfied with the dental students entailed the personality, behavior, and caring. The score of the reason was low, which reflects the satisfaction of the patients. The suggestions about dental students were positive, involved the comfort caring by dental students and the excellent manner of dental students.