The main objective of this study was to evaluate the impact of environmental management and implementation of ISO 14001 standard on organizational innovation due to the mediating role of knowledge transfer. The research methodology was based on an applied objective-based study and it can be considered surveying-correlation approach in terms of data collection and analysis methods. The research statistical population consisted of managers and employees of Sina Insurance Company. Using the Krejcie and Morgan table, 92 individuals were identified as statistical samples. A questionnaire was used to collect data in order to test the research hypotheses. To analyse data, the structural equation modelling method was employed for examining the fit of the structural equation modelling and for testing the research hypotheses. According to the results obtained, the implementation of ISO 14001 standard and environmental management directly explain 0.413% and 0.552% of changes related to the organizational innovation of Sina Insurance Company, respectively. Also, the Sobel test results revealed that the implementation of ISO 14001 standard and environmental management have a positive and significant impact on the organizational innovation through the mediating variable of knowledge transfer at a confidence level of 95%.