Given that the technology industry has developed rapidly in the last few decades, new methods of project management have also developed. The methods require a faster readiness for changes within the industry itself, and agile methods have replaced traditional project management. An agile approach has proven to be an adequate way of project management in the IT industry. Self-organizing teams represent one of the main characteristics of agile project management. The emergence of conflicts, within teams and between members during their work, is ofter inevitable. Therefore, it is necessary to react in an optimal way in order to reduce the negative effect on the project. The purpose of the work is to examine the main causes of conflicts in agile project teams, how conflicts were resolved, how frequent conflicts are and what are the consequences of conflict. Based on the presented theory about agile project management and a more extensive explanation of the key conflict determinants, empirical research was conducted. The research on which the thesis is based was conducted through an online survey that was filled out by managers and members of agile project teams. The survey was sent to 311 Croatian IT companies that are on the list of Croatian Chamber of Commerce. The research results showed that despite the numerous advantages of agile methodology, teams still encounter conflicts that they successfully resolve to the satisfaction of customers and the successful outcome of the project.