This research, was made to determine and inspect the referees’, who took part 2012-2013 season kick box games, level of decision making professional adequacy and assertiveness. The universe of this research consists of the kick box referees who took part in the games that was organized in 2012-2013 season in 9 different cities. The research sample consists of 150 kick box referees (35 women and 115 men) chosen by random sampling method among the 517 active kick box referees. In this study Melbourne Decision Making Questionnaire I-II, Rathus Assertiveness Schedule and Professional Competence Scale were used together as data gathering tools. At the end of the research; significant differences are discovered in kick box referees’ decision making, professional adequacy and assertiveness levels according to their refereeing division, marital status, being exposed to violence, level of education and age. Also professional adequacy significantly correlated with assertiveness and decision making.