This article reveals the possible connections between the forms of cooperation and the conflict resolution methods in the case of the Hungarian suppliers' - manufacturers' relations. These connections are presented in the light of the results of a research made via interviews. The results showed that in these inter-company connections the companies try to prevent the conflicts by the establishment of long- term partnerships and the connections are coordinated not mostly by the contractual relationship but by the mutually negotiated common rules and trust. Keeping this partnership is a very important intent in the solution of conflicts, however, the unbalanced power relations, the internal organization structure of companies do not always make possible to apply a way of conflict management that could deepen the partnership. In spite of this, the institution of partnership and the type of the supplied products can cause a kind of interdependence that makes possible the co-operative conflict resolution methods. In economic sociology, many researches have been carried out about the connection between the economic performance and the social embeddedness of the market relationships (Granovetter 1990). In contradiction with the neoclassical economics, these state that the market behavior is directed not only by the market rules, but the level of trust, reputation and the level of interdependence are also very important elements in the coordination of a transaction. This embeddedness coordinates the connections of the companies and gives a definite explanation what keeps the exchange connections together and how they influence economic performance. Based on these sociological results, the aim of the research was to analyze the inherent connections between the type of the inter-companies' relations and their conflict resolution methods, by the sociological and market (environmental) factors. This research goes beyond the above facts, as its aim was to find an answer to what circumstances force the parties to brake the connection (they replace each other), or to maintain the relation (whether it is spoilt or not). First, I introduce the conflict- and sociological theories and research results that explain the elements of the maintainability of inter-company connection and the elements of its limits. Then the hypotheses and the results are going to be presented, and finally, the study is closed with the conclusions.