The present paper reviews the research literature on trust in bal gaining and mediation. Several models of tryst within the bargaining process are also described It is concluded that trust means different things, depending upon the relationship under investigation. Trust among negotiators can refer to a personality ti ait (how trusting a negotiator is of others) or to a temporary state. Within the state perspective, trust Often refers to one of three orientations: (1) cooperative motivational orientation (MO), (2) patterns of predictable behavior, (3) a problem-solving orientation. Trust between a negotiator and constituents usually refers to a cooperative MO (i.e., shared loyalty) between these two groups. The addition of a mediator can impact both the opposing negotiators' relationship and each negotiator-constitutent relationship; the mediator also has direct and indirect relationships with the parties and their constituents. Future directions for research on trust are identified.