One of the new mechanisms in the field of social insurance, which entered the Iranian legal system for the first time with the approval of the Insurance Records Transfer Law in 1402, is the "aggregation pension" mechanism. Considering the favorable effects that the establishment of this pension has on the insured and the ambiguities that exist in the field of " aggregation pension" in the aforementioned act and its regulations, the current article, using a descriptive-analytical method and based on library studies, has examined the concept, principles, conditions and processes of benefiting from "collective pension" in the Iranian social security system. The findings of this research indicate that respecting acquired rights and the principle of fairness are the most important foundations for the emergence of " aggregation pension" and benefiting from this pension has conditions, the most important of which are willingness and submitting an application; entitlement to benefit from a pension in the destination pension fund; survival of insurance records; lack of overlapping insurance records and lack of insurance relationship with the pension fund of origin. In addition, to establish this pension, it is necessary to comply with the application submission processes; review and verification of conditions by the destination pension fund; calculation and deposit by the origin pension fund and establishment of the pension by the destination pension fund.