The aim of the present study is to explain the phenomenon of knowledge repression by relying on identifying the causes and consequences using a fuzzy cognitive map (case study:government organizations in Lorestan province).The present study is an exploratory research in terms of its applied purpose in terms of information collection.This research is also a mixed qualitative-quantitative research type and is equivalent to the inductive-deductive philosophy.The statistical population of the present study is experts consisting of university professors and managers of government organizations in Lorestan province, 25 of whom were selected as sample members using purposive sampling and based on theoretical adequacy.The data collection tool in the qualitative part is an interview, the validity and reliability of which was confirmed using content validity and theoretical validity and the intra-coder and inter-coder reliability measurement method. The data collection tool in the quantitative part is a questionnaire, the validity and reliability of which was confirmed using content validity and test-retest reliability.Qualitative data were analyzed using the content analysis strategy and quantitative data were analyzed using the fuzzy cognitive map method.The results indicate that the illusion of knowledge, personal motivation, reliance on existing knowledge, and being caught in the representation effect are the most important reasons for knowledge repression, respectively. Also, reducing the efficiency and productivity of the organization, the risk of organizational survival and making wrong decisions, weakness in learning and problem solving, and reducing the organization's ability and capability to express creativity and innovation are the most important consequences of knowledge repression.