This research examines the impacts of an act of knowledge management (KM) on the internal brand assets from the employees’ communication perspectives. It is meaningful in a sense that it investigates KM from a brand-communication’s point of view, which is unprecedented compared to the prior studies that mostly discussed from a managerial point of view. Accordingly, this study tries to understand the insiders’ KM actions and its relations to the corresponding brand attitudes and to their attachments to the house brand. In order to achieve the purpose of this paper, it argues if the KM can be treated as a part of internal brand management by identifying the concepts of KM and of internal branding from the precedent studies. The model for this research is drawn from the preceding researches, and consists of the levels of KM activities and their correlations, such as knowledge creation, knowledge sharing activities, knowledge applications, and internal assets as brand attitudes and brand attachments. For statistical tests, a survey is conducted subject to the employees from corporations that are implementing KM; and the result from the questionnaires is used to run the Structural Equation Modeling (SEM.) As it turns out from the analysis, the corporate’s KM has a positive impact on their employees’ brand attitudes. Among the various KM activities, knowledge sharing seems to have the strongest influence; this points out the importance of a communicational approach to KM since knowledge sharing is the most frequently communicated KM type between internal customers. Also, it is verified that brand attitudes can act as a mediation effect between KM and brand attachments due to the correlations between KM activities, house brand attitudes and attachments; this reflects that KM can have a positive effect to the employees’ brand attitudes in the short term as well as their attachments to the house brand in the long run.