Purpose The  purpose  of  this  thesis  is  to  identify  the  role  of positive  emotions  in  project  failure  and  how  these emotions  affect  corporate  entrepreneurs´  decision-making and motivation. Theoretical perspective Entrepreneurial Failure, Emotions, Appraisal Theory, Attribution  Theory,  Psychological  Ownership,  Psychological Capital. Empirical foundation Seventeen respondents from 14 entrepreneurial companies  were  interviewed to identify  the role of positive emotions in  project failure and  their impact  on corporate entrepreneurs’  decision-making  and motivation in subsequent projects. Interviews were conducted by phone (1), audio conference (2), video conference (3) and face-to-face interviews (4). Conclusion We  offer  a  model,  which  shows  the  three  positive emotions that were found to be experienced in project failure, namely relief, confidence and challenge and their  impact  on  corporate  entrepreneurs’  decision-making and motivation in subsequent projects.