Introduction: In this paper, the relationship between social capital and subjective welfare among the staff of Ministry of Welfare and Social Security have been studied. The basic question of this study is “What is the relationship between Social Capital and Subjective welfare"? and "Do staff’s Subjective welfare, lead to increase Social Capital or not?".

Method: research method was survey, for collecting data, questionnaire was used. 160 people of the staff of Ministry of Welfare and Social Security (1388) were selected by Cochran’s formula, based on proportion classification sampling.

Findings: the research indicates have shown that subjective welfare dosnt have any significance difference among background variables discussed in this research such as sex, age, and so on. Also there is no significant relation between social network, civil participation and institutional trust with subjective welfare, while, there is a significant relationship among social capital and indexes of interpersonal trust, generalized trust and social participation with subjective welfare.

Discussion: Conclusion of research indicates have shown that social capital impacts on subjective welfare in other words, increase of rate of social capital is lead to increase of subjective welfare.