Perceived justice has become an important research issue in the business setting the last years (Cohen-Charash & Spector,2001; Colquitt, Conlon, Wesson, Porter & NG, 2001). With this doctoral project we want to expand the study of perceived justice to the sport context, particularly to the role of the coach in team sports (Jordan, Gillentine & Hunt, 2004).In the first place, we attempt to develop a valid measure instrument toexamine the perceived justice of the coach (Colquitt, 2001; Colquitt & Shaw, 2005). Furthermore, we examine the effects of the coaches perceived justice on the behavior and attitudes of team players. Secondly,we scrutinize which factors (i.e., coaching style, transparency, win/lose, ) determine this perception of justice of the coach. We do this outof a longitudinal perspective, where we use web-based questionnaires during a couple of weeks. Eventually we have planned an intervention study, where we guide the coaching behavior. In this way we want to increase the perceived justice of the coach and examine the effects (i.e., increased intrinsic motivation, better performances, ) that are linked with this perceived justice.