Taking into account the underdeveloped situation of Hungarian fruit and vegetable producer organisations (POs) as a starting point, present paper examines the role and impact of two (affective and cognitive) dimensions of trust in two POs based on empirical data collection supplied by members of two the organisations. Evaluation of databases was done by the help of descriptive statistics and we used variance analysis (ANOVA) as well as multivariate regression models. According to our findings we can state that trust has key role in POs and it has - statistically proved - influence on group cohesion, satisfaction and activity of members.