The ski industry in Korea has experienced tremendous growth in recent decades. In 2002, more than four million skiers visited ski resorts in Korea (Lee & Lee, 2003). As the number of ski resort increases, there is severe competition among ski resorts to attract more skiers to the ski resorts. To survive such a competitive market environment, ski resort managers have shown an increasing interest in internal marketing strategies rather than external marketing. In other words, ski resort managers begin to focus on how to manage their organizations in an effective way. OCB has been viewed as contributing to long-term organizational success because of its function of improving organizational efficiency and effectiveness, innovativeness, and adaptability (Organ, 1988). Also, organizational commitment has become an important topic for organizational research due to its association with OCB or extra-role behavior (Moorman, Nierhof, & Organ, 1993). Despite the importance of understanding the relationship between organizational commitment and OCB, there has been no study examining such a relationship in ski resorts in Korea. Hence, the purpose of this study was to examine the relationship between organizational commitment and OCB with the sample drawn from ski resorts in Korea. Smith, Organ, and Near's (1983) two dimension scale was modified to measure OCB in this study. For organizational commitment, the two-dimension model (Chang & Chelladurai, 2003) was employed in this study. The population of this study was ski instructors and patrols employed in six ski resorts in Korea. The questionnaire was distributed to a total of 240 instructors and patrols, and 197 valid surveys were returned. The result of the confirmatory factor analysis showed acceptable unidimensionality and construct validity of each subscale (cē=81.019, p<.05, NFI=.912, CFI=.938, AGFI=.895, RMSEA=.965 for organizational commitment and cē=28.576, p<.05, NFI=.963, CFI=.979, AGFI=.914, RMSEA=.079 for OCB). The result of the structural equation model indicated that the overall fit of structural model was acceptable. Also, the results uncovered a significant relationship between affective commitment and OCB (r=.39, p<.05) and no significant relationship between continuance commitment and OCB (r=.20, p>.05). These findings were consistent with the results of previous research. An important implication of this study is that a ski resort manager's effort to enhance affective commitment would result in an increase of citizenship behavior within his or her organization so that the manager can achieve more effectiveness and efficiency.Keyword(s): sport management