Disclosed is a method of setting a recording end reservation time for instant recording in a Digital Video Recorder (DVR) of a received digital broadcast. The method includes steps of selecting an instant recording function, creating an OSD window for displaying at least one preset invariable recording end reservation time to display the preset invariable recording end reservation time, analyzing PSIP information from the received digital broadcast and extracting “available program information” including information about a time to terminate the digital broadcast program intended to be recorded at present, setting the recording end reservation time through the OSD window when the “available program information” does not exist, and adding to the OSD window a setup item to enable setting by a user of a recording end reservation time, and setting the recording end reservation time through the OSD window having the added setup item when the “available program information” exists.