The outburst of conflict of interest and differences in organizations and diverse group works is something inevitable and natural. Also the appropriate attitude of managers through different stages of conflict can surely prevent crisis and breaking up of organizations and economic activities, from the beginning to the end. Cooperative
organizations whose main concern is to meet their member's needs
and democratically controlled by the participation of their members,
despite their democratic management style, face internal conflicts as a
result of differences in interests between the managers and the members. Beside financial losses, cooperatives which are regarded as socio - economic organizations, believing in fair income distribution
in society and who have caused a tight link between common needs
and mutual support in that proper relation of member and organization would lose reputation. On the basis of the first research on the reasons of conflict in diverse Iranian Cooperatives, this article will analyze
1253 complaints and sues against 224 housing, consumer,
transportation, producer supply and credit cooperatives through
Tehran province and would provide some suggestions for conflict
handling and decrease of differences in cooperatives.