This work is a result of a research on the process of training value that constitutes the foundation over which articulate the interorganizational relations present in the agribusiness production chains. These are comprised of distinct organizations united by a relational component not yet well explained by the existing approaches. The main objective consists of the search for a better understanding of how the construction process of interorganizational relations are established under the perspective of value creation. The research was developed using the milk production chain in Rio Grande do Sul, Brazil. As results, we highlight that the market relations differ from the long-term partnerships formed within the milk production chain regarding the performance of transactional and relational value elements. The first are more significant in market relations, and the relational value elements constitute the foundation of long-term partnerships