The paper investigates the impacts of trust on the relationships among members and between members and the management in an agricultural marketing cooperative in the Hungarian horticultural sector. We focus on the effects of trust on cooperative members' performance and satisfaction and their commitment to remaining a part of cooperative. We analyse the trust along two dimensions: cognitive and affective. Our results suggest that trust among cooperative members and trust between cooperative and management have positive effects on group cohesions. In line with a priori hypotheses we found differences between cognitive and affective trust influencing the group cohesion and cooperative members' satisfaction.