The present invention provides a recording/reproducing device which shortens time required for dubbing, when a user performs the dubbing of program data. The recording/reproducing device of the present invention is a recording/reproducing device which records and reproduces information, including: a tuner control unit 4 which obtains first information; a recording/reproduction control unit 13 which records, in an HDD 15, the first information obtained by the tuner control unit 4, and records, in an optical disc held in the optical disc drive 14, second information which is information having the same content as the first information; a CPU 5 which invalidates the second information; and a user input control unit 9 which receives an instruction requesting the first information recorded in the HDD 15 to be recorded in the optical disc. In the case where the user input control unit 9 receives the instruction, the CPU 5 validates the invalidated second information.