A method of transmitting/receiving a broadcasting signal and a broadcasting receiver are disclosed. A rating region table (RRT) including a rating value identifier identifying rating information is stored, and, when broadcasting contents are received, the rating value identifier is obtained from a descriptor (or service discovery information) including the rating information of the contents. Then, the received broadcasting contents can be blocked according to the rating value identifier obtained from the descriptor and the rating value identifier of the RRT. Accordingly, although the RRT is changed, the broadcasting contents can be conveniently blocked using the unchanged rating value identifier.