Abstract: Secondary mortgage is the bridge between money and capital markets. Activating secondary market of housing mortgage allows utilizing stagnant resources of primary market of housing mortgage and equipping the new sources in the housing sector in order to enter into facilities cycles. The experience of other modern countries also shows that secondary market, as a channel for driving liquidity to the housing sector is the fundamental solution to eliminate such a constraint and expand housing required financial market. The present study aims to assess effective factors on success of admitting secondary market of housing mortgage in Tehran province. The statistical universe of the study included experts at housing field in Tehran province as a total number of 204 persons. However, according to Morgan table, the statistical sample was specified as 132 persons. The data collection tools included as follows: review of documents and evidences as well as researcher made questionnaire consisting of 37 measures based on Likert scale and interviews with scholars in the financial and housing sectors. The research method here is correlational and it is applied in terms of objective. In this research, descriptive statistics and inferential statistics were used for data analysis. For evaluation of factors, the collected data was analyzed using statistical tests compatible with the hypotheses (one sample t-test and regression) by the software package SPSS. The results indicate effectiveness of four factors (cultural-normative, religious-ideological, legal-structural and educational-information) on secondary market of housing mortgage.