Based in concepts and models of “commercialization”, this work has as objective to analyze the transmissions of prices between producer, attacked and retail of the productive chain of the beans in the state of the Paraná, in the period of 1995/ 2003. For this, it was verified as the variable price was transmitted between the segments, esteem itself the edges and the causality direction enters the three sectors of market, that, together with the improvement of the final product, serve as indicating of efficiency in the distribution and commercialization of the product. In general way, the retail caused variations in the prices to the producer and attacked - causality confirmed for the application of model VAR - but that it did not represent an explosive trend of this variable. The study it discloses a trend of stability in the price the attacked one, followed of small decreases, together with the profit of importance of the supermarkets in the distribution of beans to the retail, guaranteeing the final product quality. The reorganization lived for this sector reflects the moment of economic stability occurred in the country and the new profile of the consumer.