As a preliminary step of composing the concept of sport, the meaning and significance of sport as a social institution was discussed through reconsidering J.W. Loy\u27s five papers on sport paradigm. After examining his papers following problems were pointed out. 1) As a criterion of classifying play, game and sport, the dichotomy of competition and physical prowess is too narrow while the institutionalized level is too wide. Since institutional pattern is recognized both in sports and games, it can not be a proper criterion of classifying them. It is not clear that how expressive and instrumental aspects, as well as play and work, of his paradigm are to be integrated and sublated. 2) Loy\u27s definition of institution is still ambiguous. I...