Abstract
Social exchange theory is used in this paper to explore how the quality of leader–member exchange (LMX) and perceived organizational support (POS) affect Brazilian nursing professionals’ perceptions of bullying and harassment and, in turn, their wellbeing. Data was obtained from 868 nursing professionals in four public hospitals in Brazil. Statistically significant linkages were found between LMX, POS, bullying/harassment and wellbeing, except for the relationship between POS and bullying/harassment. Healthcare managers and human resource managers clearly need to take initiatives to strengthen LMX and POS, minimize bullying and to strengthen nursing professionals’ wellbeing.