In this paper, using structural equation modelling, significance of relationships between the affecting factors and knowledge-sharing behaviour was examined. To test the proposed model of research, an Iranian leading company in the field of ICT was selected. Using the structural model as an output of data analysis, the significant influentive constructs of model were identified. According to the results of data analysis, it was clear that Managerial Factors (MFs) and Personality Traits (PTs) have significant influence on knowledge-sharing behaviour in the organisation.