The study presents an analysis of the coordination between the cassava's producers and the cassava's processors industry located in the west of State of Parana (Brazil). In a few years this chain became dynamics because of many factors, such as the institutional that is the most important one. In the last years it was verified a large volatility in cassava's production and price, that compromised the chain performance, mainly the cassava's starch modified production and price, which has high aggregate value. One of this oscillations cause, among other reasons was the lack of coordination between agents. To find evidences and solutions to the studies answers, the new institutional economy approach was studied. Three cassava's starch industries were analyzed in the west of the state of Parana. The reasons for that are low specifity of the assets and the lack of professionalism of the producers. The findings show low existence of contracts between agents, bringing structural problems for the entire chain.