The purpose of this study is to explore the mechanisms of how feedback from supervisor affects innovative work behavior among local government employees in Korea. Another purpose of this study is to explore the mediating roles of trust in supervisor and affective commitment, and the moderating role of risk-taking climate, using various theories, such as organizational support theory, social exchange theory, intrinsic motivation theory, and psychological climate theory. The results from a cross-sectional study based on a sample of 1,699 local government employees from 65 local governments find that feedback from supervisor has a significant direct effect on innovative work behavior. Trust in supervisor and affective commitment significantly mediate the relationship between feedback from supervisor and innovative work behavior. Feedback from supervisor has an indirect effect on innovative work behavior through its influence on trust in supervisor and affective commitment in serial. Risk-taking climate significantly moderates the relationship between affective commitment and innovative work behavior. Lastly, the results of moderated mediation model find that the conditional effects are significant at high levels of the moderator (at one standard deviation above the mean) and at the mean, while the conditional effect was not significant at low levels of moderator (at one standard deviation below the mean) for both two indirect effect paths (feedback from supervisor --> affective commitment --> innovative work behavior, and feedback from supervisor --> trust in supervisor --> affective commitment --> innovative work behavior).