This case study is an evaluation of channel members’ dissatisfaction of foodstuff distribution system in Tehran and presenting complaint management model. The case is studying 3 major distribution companies in Tehran which are Behpakhsh, Ghasem Iran, and Alborz. According to the research model, there is one major hypothesis and five minor hypothesizes in this study. This is a practical study in terms of objectives, yet it has a correlational approach in implementation. The research population universe is all sales points which take delivery of goods from the above three distribution companies and sample size is calculated 196 stores that have been increased to 240 in this study.Data collection has been through questionnaire with Cronbach’s Alpha multiple of 0.858. Following data collection and grading, all data has been evaluated by descriptive and inferential methods. Overall, the results show that the main assumption of the study is not invalid; consequently, designing and implementing the appropriate complaint management model will increase the satisfaction of intermediary channels.