Abstract
Knowledge is a key to achieve success and sustainability of an organization, because the ultimate goal of utilizing knowledge is performance. One of the processes of knowledge management which becomes something important in an organization is encouraging individuals to have knowledge sharing. The important factors affecting knowledge sharing activity are factors of individuals and organization. This study aims to examine the effect of exogenous variable consisting of organizational dimension including organizational learning culture, support from top management, and individuals namely openness in communication in affecting knowledge sharing of individuals. Besides, this study also examined how the role of knowledge sharing in improving human resource performance at Sharia Banking. This study was conducted through SEM (Structural Equation Modeling) test by using SmartPLS, a statistical software. The study was done through survey method by distributing questionnaire to 66 employees from several departments at one of Sharia banks in Semarang. To determine a number participant to be a sample, Slovin formula was conducted by using proportional random sampling technique. The findings of this study showed that two organizational dimensions (Organizational Learning Culture and Top Management Support) have significant effect on the improvement of knowledge sharing. While Openness in Communication, the individual dimension, could not determine the improvement of knowledge sharing. Then, the improvement of human resource performance at sharia banking could be done by improving knowledge sharing.

Keywords: Knowledge Sharing, Work Performance, Sharia Banking.