A method of receiving and processing a broadcast signal including a Non-Real Time (NRT) service and a broadcast receiver are disclosed herein. A method of processing a Non-Real Time (NRT) service in a broadcast receiver, the method comprises receiving and processing first signaling information including content access information and second signaling information including content detail information, receiving and processing third signaling information including content update information, receiving and storing a content including at least one file through NRT based on the first signaling information and the second signaling information, identifying update availability of the content based on the content update information included in the third signaling information, and receiving at least one file included in the content by accessing a File Delivery over Unidirectional Transport (FLUTE) session transmitting the content when the update is available.