This study was conducted to determine the relationship between the trait anger and anger expression styles of karate trainers and their cognitive flexibility levels. The research was carried out using the relational screening model. The universe of the research consists of karate trainers affiliated to the Turkish Karate Federation, and the sample consists of 83 karate trainers, 18 women and 65 men, selected by scale sampling method, one of the purposeful sampling methods from this universe. Personal information form, Cognitive Flexibility Scale developed by Bilgin (2009), and Trait Anger Expression Styles scale adapted to Turkish by Özer (1994) were used as data collection tools. Descriptive statistics and Pearson correlation analyzes were applied to the data. As a result of the research, a positive and significant relationship was found between age and years of coaching and trait anger style. On the other hand, a significant negative correlation was found between age and years of coaching and cognitive flexibility. Finally, a negative significant relationship was found between anger styles scale, anger expression sub-dimension and cognitive flexibility scores.