Method for transmitting and receiving v2x message in wireless communication system, and an apparatus for same

An embodiment of the present invention relates to a method for transmitting and receiving a vehicle to everything (V2X) message of a first road side unit (RSU) in a wireless communication system, the method comprises the steps of: transmitting, to an ITS server, information associated with PC5 interface congestion; after transmitting the information associated with PC5 interface congestion, receiving a first V2X message; and broadcasting a second V2X message on the basis of the first V2X message, wherein the second V2X message indicates that the second V2X message is control information via a packet data convergence protocol (PDCP) service data unit (SDU).