Abstract: Since being a member of networks and a set of common values and business goals and common culture are at the heart of the concept of social capital so in order to achieve these objectives and common culture we need those staffs who haveattachment and attachment to their organizations to reduce the costs of turnover, handling, transfer, transportation, absenteeism and negligence and makingtrust, mutual understanding, commitment and communicationalst ability as the elementsof social capital especially in municipalities including the municipality of Esfahan that has the responsibility for urban administrations, diversified serving of citizens and providing their satisfaction and well-being. By this purpose this study aimed to determine the relationship between perceptions of social capital and organizational attachment in the municipality of Esfahan by using descriptive and correlational method. The study population included of 2014 Esfahan municipal employees that 132 individuals were selected among them by using Cochran formula and stratified random sampling to participate in investigation. Data analysiswas done in two levels of descriptive and inferential method and by using Software of SPSS 19. The findings of this study showed that coefficient correlation ismeaningful between the perception of social capital and organizational attachment which means there is a significant relationship between perceptions of social capital and organizational attachment. Also perception in terms of cognitive and relational dimension of social capital has predictability of organizational attachment which means there is a significant relationship between the perception of social capital and organizational attachment. Further more, there is significant relationship between perceptions of relational and cognitive aspects of social capital with organizational attachment of staffs but the relationship between perceptions of structural dimension of social capital with organizational attachmentof staffs is not significant. Also, there is a significant relationship between the perception of the structural dimension of social capital, cognitive social capital and relational dimension of social capital and organizational attachment.