The present invention relates to a full time regenerative type single radiant tube burner. The full time regenerative type single radiant tube burner includes a radiant tube type burner; a regenerating unit that regenerates exhaust gas heat generated from the burner and is used for preheating the intake combustion air; and an intake and exhaust switching device that passes the intake air and the exhaust gas to the regenerating unit and heat-exchanges them and simultaneously progresses the intake and exhaust processes of the burner to perform the full time combustion.The present invention according to the above configuration operation can perform the full time combustion using the single radiant tube burner to maximize the combustion efficiency, thereby improve the energy efficiency, while the present invention makes the structure of the intake and exhaust switching device 300 simple, can compactly design the burner by mounting the regenerating unit 200, which is integrated with the intake and exhaust switching device, to surround the circumference of the burner body 110 and can manufacture the burner at a small size, such that it can be applied to various environments without limiting the installation space.