One of the approaches of sociology is <>. It has been noticed in other sciences too, communication is the base of this approach. It is named as a capital beside the other capitals( human, secular, physical and …). Its principle components are normativism, trust, and comm::::union::::. The concepts of social capital can be found in old thinker's opinions; amongst Sa'di who was acquainted whit his time communities life because of several journeys. Golestan as a moral_ educational oeuvre is reporter of real society of Sa'di. This paper has checked the comm::::union:::: component in Sa'di's Golestan predicatively with qualitative and quantitative content analysis and has shown that, of the of the comm::::union:::: indices, social comm::::union:::: has had the highest frequency and in terms of comm::::union:::: type, tool comm::::union:::: in which there is the personal incitation footmarks and taking the gain, has the most frequency. The comm::::union:::: based on job repartition is in the secondary position and bound comm::::union:::: in which there is expectance of mutual help is the third kind of comm::::union::::. The frequency of these comm::::union::::s regarding Saljukian, Ghaznavian, and Muguls' post invasion realities which is the moral and secular demolition world of Iraian social life is natural