According to the concept of trust in management since the 1980 s and over the last few decades, different angles and approaches have been studied. Trust is an essential factor for individual and organizational success. Trust among individuals and employees is a result of the stability, unity and Intra-organizational cohesion, Performance upgrades the efficiency and effectiveness of groups and grounds of cooperation, participation and communication.This study aimed to design a model of intera - organizational trust through collective action in education of Tehran. This research is an applied research in terms of purpose and is Survey-exploratory and qualitative research. The population of the study consisted of senior managers of department of education in Tehran, university professors and advisors, who were interviewed in depth. The selection of experts and interviews with them continued until theoretical saturation and then stopped.In this research, since the grounded theory method was used, the main tool for data collection was in - depth interviews with experts. Finally, after three open, axial and selective coding, conceptual model of research was designed. So far, no study has been done in this connection in the department of education in Tehran. This model is classified as causal, axial, contextual, strategic and consequential variables.