Organizational commitment is greatly affecting the quality of services provided by a customer oriented organization, particularly for hotels and inns. The satisfaction and loyalty of the customer are derived from superior service quality. The innovative service of the employees' behavior can be improved by increasing knowledge-sharing among employees. The purpose of this study is to examine the relationship between work motivation and job satisfaction with knowledge-sharing behavior at 4 star hotels in Badung regency, Bali, as well as to predict the role of organizational commitment as mediation in the relationship between work motivation and job satisfaction on knowledge-sharing behavior. This study uses a quantitative approach. The population of the study is 17 four star hotels located in Badung regency of Bali. There are 123 samples taken by applying to the operational employees at the level of the rank and file as the unit for analysis. Structural Equation Model with PLS 2.0 was applied to analyze the data. The result showed that there is a significant relationship between job satisfaction and the organizational commitment. Work motivation has no significant positive relationship toward organizational commitment and knowledge-sharing behavior. The organizational commitment has the full mediation role for the relationship between job satisfaction and knowledge-sharing behavior. The novelty in this study is the examination of the relationship between work motivation and knowledge-sharing behavior and the examination of the role of organizational commitment as mediation. Organizations need to increase employees' job satisfaction as this will have an impact on improving organizational commitment. Increased organizational commitment is essential to improve employees' quality of services provided to customers. Improved quality of service, to avoid the failure of service delivery and reduce operational costs, can be improved by developing knowledge-sharing behavior.