The Freight Forwarders are one of the institutions that are active in the field of transportation. They are more active in the field of international commercial transportation, especially combined or multimodal transportation. To show the About the importance of this institution, shall tell importance of this institution, one may say that in transportation process, using the services of these institutions is essential. Despite the important role of the Freight Forwarders in the transportation industry, unfortunately, puts doubts there is ambiguity about the nature of the obligations and responsibilities that exist, so that the institution is paralleled considered as an equal to thrones in charge of transportation with the same responsibilities in the carrier considered and responsibility for the same Carrier been raised. Also about the bases of Freight Forwarder>s liability, iIn different legal systems various and sometimes vague approaches have been adopted various and sometimes vague approaches about the bases of Freight Forwarder>s liability. This can be caused by a lack of international conventions, weak legislation and silence of regulations relating to the transport. This study is trying to examininge The bases of Freight Forwarder>s contractual liability on the two different approaches (Presumed-fault and Strict liability), and in different regulations, including regulations of FIATA, and secondarily on the Llaw of different countries like Iran, England, France, Belgium, Italy and Spain are examined.Finally, it is significant that the «Presumed-fault» as the minimum approach is acceptable, of course, exacerbate the bases of Freight Forwarder>s liability with regard to the specialized nature of this institution, is tenable. The The research in this paper is a cross methodology is descriptive and analytical.