The purpose of this study is to understand the maturation level of moral judgment in sport specific dilemmas of baseball players in Taiwan. The subjects are baseball players from junior, senior high school, and college. The application of the investigation results is to serve as a reference for the teaching and training of developments in moral judgment of sport specific dilemmas. 155 subjects are selected from the baseball players of the junior high school, senior high school, and college in the northern and southern Taiwan. Methods of data collection include the use of questionnaire and semi-structure interview. The instruments used for investigation are Sport Defining Issues Test (S.D.I.T.) and Moral Judgment in Sport Specific Dilemma Interview Format (S.S.D.), which are both self-designed by researcher. Descriptive statistics, frequency distribution , F-Test, and χ2 -Test are used for data analysis. Within the scope of this study, the following conclusions were derived: 1. Most of the baseball players' moral judgment in sport specific dilemmas show substantial representations of Stages 6: the universal ethical principle orientation, less then Stage2: the instrumental relativist orientation.2. There is no significant difference among the age of junior, senior high school, and college baseball players in moral judgment of sport specific dilemmas.3. The identification factors of the baseball players' moral judgment in sport specific dilemmas from top to down are: (1) life, (2) honest, (3) moral-conscience, (4) freedom, (5) commitment, (6) justice, (7) emotion, (8) authority, (9) property, (10) law, and (11) punishment.