Method and device for performing terminal cooperative transmission in wireless access system

The present invention relates to a method for performing terminal cooperative transmission through direct link communication between a source terminal that requests terminal cooperation and a cooperative terminal that performs the terminal cooperative transmission with said source terminal in a wireless access system, and the method comprises the steps of: allowing said source terminal to transmit a terminal cooperation request message for requesting the terminal cooperative transmission to a base station; allowing said base station to transmit control information for establishing a direct link between said source terminal and said cooperative terminal to said source terminal; and allowing said source terminal to establish a direct communication link with said cooperative terminal, on the basis of said received control information, wherein said control information contains: dedicated random access channel (RACH) allocation information for synchronization between said source terminal and said cooperative terminal and for channel measurement; and dedicated random access channel (RACH) preamble sequence information.