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The aim of this study was to investigate the relationship between conflict management styles and performance of national sport federations heads. The statistical population of this investigation included presidents and vice- presidents of national sport federations. (According to 52 federations, they were 150 people) that all of them considered as the survey samples. According to the aims of survey standard questionnaire of conflict management styles (Putnam & Wilson) and Achieve (Hersey and Goldsmith) were used. Reliability of questionnaires was estimated by Cronbach Alpha that the coefficients for these instruments were r=0/82 & r=0/84. The data analysis was done using descriptive and inferential statistics. Results indicated that federations’ heads prefer to use collaboration and compromising styles first and then avoidance, accommodation and domination. In the case of performance, seven factors of achieve model in order were found as ability, clarity, validity, environment, evaluation, organizational support and incentive. There was a significant positive relation between performance and collaboration style and also significant negative relation between performance and domination & compromising, but there was not any relation between performance and avoidance accommodation styles.