This study examines the association between teachers' preferred interpersonal behaviour in teaching and their thinking styles. A sample of 131 secondary teachers from Hong Kong (n = 94) and Macau (n = 37) participated in a survey to measure their preferred interpersonal behaviour by the questionnaire for teacher interaction (QTI) and their thinking styles by the thinking style inventory-revised (TSI-R). Results indicated that teachers in both regions preferred to employ student-centred interpersonal behaviour (leadership, helpful and friendly, understanding and freedom teaching styles) in the classroom teaching. Teachers' thinking styles were related to their preferred interpersonal teaching styles. Specific relationships were found between the types of thinking styles and their preferred teacher interpersonal behaviour among Hong Kong and Macau teachers. (Contains 5 tables and 1 figure.)