The goal was to test the psychometric properties of the Moral Functioning Scale in a Greek athletic context, and to investigate any possible relation between moral functioning and planned behaviour. The sample comprised 384 athletes, 103 from the sport of football (soccer), 97 from basketball, and 184 from water polo. To measure moral functioning the researchers used a scale developed by Gibbons, Ebbeck, and Weiss. Planned Behaviour was assessed with a questionnaire based on Planned Behaviour Theory. Hierarchical regression analysis indicated strong association for Attitudes, Intention, Role Identity, and Perceived Behavioural Control with the four dilemmas of the moral functioning scale. The moral reasoning measure is a promising tool for measuring athletes' moral dilemmas in Greece.