Abstarct: Organizations are traditionally relying on their internal knowledge to form their organizational strategy. However, they have recently turned to new sources of knowledge which exists outside the organization. One of the main sources of organizational knowledge are customers because they represent a source of knowledge that can offer new views, innovations and ideas which are not necessarily found within the organization. The goal of this survey is to understand how and to what extent customer knowledge is applied in the branches of Saipa Co. in Esfahan. To do so, a case study was conducted in these branches. The target population is all the employees of the branches of Saipa Co. in Esfahan, being a total of 400. Using simple sampling method, a sample of 83 were chosen and a questionnaire containing 30 questions in 3 parts, the validity and reliability of which was approved, was handed to them. After collecting the questionnaires and performing statistical analyses, the six hypotheses were tested. The results show that employee perceptions and believes – or the organizational culture – is positive towards customer knowledge, customers present useful data to the organization in various contexts, but although the application of this knowledge is in a meaningful level, this part has a relatively low average compared to the other two parts, and it can be concluded that the application of customer knowledge in Saipa Co. is not in an acceptable level