The aim of the present research among Dutch police officers was to examine whether fluctuations in emotional job demands predict exhaustion through the suppression of discrete emotions. A first diary study (N = 25) tested how the suppression of discrete emotions is related to exhaustion at the end of the work shift of police call-center service workers. Results revealed that suppressing anger was positively related to exhaustion at the end of a work shift, whereas suppressing happiness was not. A second study (N = 41) among criminal investigation officers showed that the emotions anger, abhorrence, and sadness were among the most common negative emotions that were suppressed as part of the emotional labor of this specialized occupational group. Results of a third (diary) study (N = 39) confirmed that emotional dissonance and more particularly the suppression of abhorrence mediated the relationship between emotional job demands and exhaustion at the end of a work shift. © 2011 Taylor & Francis.