Most of organizations are working in an environment in which, their business is exposed to inevitable changes. So, these organizations need to adapt their business processes according to the changes constantly, to maintain their competitive advantages. The risky nature of business process management requires a careful examination of key factors and failure causes.  Therefore, the main goal of the current research is to provide a change management model for implementing business process management.  To reach to the goal, the combination of Dematel and Fuzzy ANP methods are used. The method used in this research is applied-developmental in terms of purpose and descriptive in terms of analysis. Also, based on the type of data, it can be considered as a survey. In the first step, through comprehensive literature review the effective management factors affecting the implementation of business process management were identified and extracted. In the next step, Fuzzy Delphi technique was used to screen the identified variables. Subsequently, with a survey of experts in the field of change management, key factors were grouped into 7 main factors. In the next step, the internal relations between the main factors were calculated using Dematel method. Then, Dematel and Fuzzy ANP were combined to calculate the weights and rank the factors. Identifying the causal factors and prioritizing the effective change management factors in implementing business process management in organizations is one of the important results of the research