In an increasingly complex, dynamic and highly competitive environment, there has been a proliferation of interorganizational relationships with an emphasis on cooperative relationships. For companies to define or redefine the terms of interdependence in established transactions, negotiations are required, and trust has been considered crucial for enabling joint gains in the development and implementation of the agreement. Negotiators who trust each other transfer their thoughts more comfortably and more readily accept the ideas of the other party because trust not only reduces transaction costs but also has a mutually causal relationship with information sharing, which further creates value in the exchange ratio. The present study analyses trust in the negotiation processes of interorganizational partnerships. The three areas of study, interorganizational relationships, trust and negotiation, are interlinked; therefore, a conceptual model for analysing the dimensions of trust in an integrative negotiation is proposed. The analysis covers the three stages of a negotiation process between two organizations: pre-negotiation, negotiation and post-negotiation. From the results of this study, it is concluded that identifying and developing actions to strengthen the trust dimensions in the processes of relationship negotiations between organizations is important for cooperatively developing and encouraging mutual benefits for the companies involved.