The main objective of the study was to test REBT model of emotion in prediction of burnout. It was hypothesized that dysfunctional negative emotions (DNE) would positively predict burnout, positive emotions (PE) would negatively predict buronut, while functional negative emotions (FNE) were hypothesized to be uncorrelated to burnout. To test those assumptions, a short. term, 12 week prospective study was carried out (three measurements, with the interval of 6 weeks). A sample of 197 employees took part in the first measurement (60.3% women); however, due to sample attrition, 113 (64.6% women) underwent all three measurements (Little's MCAR test n.s., which indicates that the data were missing completely at random). Respondents completed the Work burnout scale from the Copenhagen Burnout Inventory, and the Inventory of functional and dysfunctional emotions. It has been shown that the reversed causal model displayed greater fit indices in comparison with the causal model, meaning that it is more likely that burnout will lead to subsequent emotions than vice. versa. What is more interesting is that in fact burnout had a stronger (although very similar) impact on FNE than it did on DNE. However, when measured simultaneously, it appears that the experience of emotions has greater effect on burnout than vice. versa. Moreover, in cross. sectional analysis (at Time 3), FNE had a greater (although very similar) unique effect on burnout than did DNE. In Time 2, only DNE exerted significant effect on burnout. Finally, PE largely did not predict burnout. The results were discussed in the context of REBT model of emotions. The limitations of the study were also highlighted and discussed.