This study focused on the determination of the effects of student teachers' positive and negative metacognitive beliefs on their interpersonal relationships. The sampling consisted of 230 student teachers studying at Hacettepe University, Faculty of Education. The data were collected through "Interpersonal Relationship Dimensions Scale" developed by Imamoglu (2009) and the "Metacognition Scale" developed by Cartwright-Hatton and Wells (1997), which was adapted to the Turkish sampling by Tosun and Irak (2008). The findings of this study, which is based on the hypothesis that the interpersonal relations of student teachers are closely related to their metacognitions, would contribute to the determination of the connection between student teachers' interpersonal relationships and their metacognition. (C) 2012 Published by Elsevier Ltd.