Abstract: In the era of ultra-competitive, organizations are faced with new challenges which out of them require the special attention to developing and strengthening the market orientation skills and this is done through the basics of organizational knowledge. Therefore, this study aims to Investigating the effect of market orientation and knowledge sharing on development of organizational performance. That is a descriptive-survey which has been administered in a field method. The statistical population in this study consists of all employees working for the Lorestan insurance companies (N = 121) that due to the limited number of population, data were collected by census methodology with the help of questionnaire. In this regard, four hypothesized were presented which tested by the partial least squares method and Smart PLS software. The results indicate that the positive effects of market orientation on knowledge sharing, market orientation on organizational performance and knowledge sharing on organizational performance were approved. Therefore, at the confidence level of 0.95, we can say that market orientation with a path coefficient of 0.758 has a positive and significant impact on knowledge sharing, market orientation with a path coefficient of 0.658 has a positive and significant impact on the organizational performance and the knowledge sharing with a path coefficient of 0.589 has a positive and significant impact on organizational performance. This study helps to find the ways to the synergy of knowledge and company performance. The attention Market Orientation and consequently, the use of the merits of distribution of knowledge by them can advance industry condition, coupled with the speedy strong.