The present invention relates to a method for enabling a MTC (machine type communication) IWF (interworking function) to perform a trigger request in a wireless communication system. The method includes transferring, to a first serving node, the trigger request and information related to retrying the trigger request which includes information on whether to retry if the transferring of the trigger request fails, wherein if the information on whether to retry indicates retrying, the retrying of the trigger request is assigned to the first serving node.