This study investigated Korean and foreign students' perception of the teacher's role in multicultural online learning environments in Korea. On the basis of a literature review, a survey questionnaire was developed and piloted with 248 university students in Korea. The questionnaire was subsequently modified on the basis of the results of the pilot study, and a final 20-item questionnaire was constructed. Three hundred and eighty-four university students participated in the main study. Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were used for statistical analyses. The results indicated that students have a particular perception of the teacher's role in a multicultural online learning environment. Five different types of teacher's roles—pedagogical,... managerial, technical, affective, and differentiating—were identified. The teacher's affective and differentiating roles, which were not identified as crucial in previous research, were found to be significant roles for both Korean and foreign students.