A combustion controller for a tubular flame burner, the tubular flame burner comprising: a tubular combustion chamber whose front-end is open; and, a plurality of fuel-gas spraying nozzles (411a, 411c; 413a, 413c) and a plurality of oxygen-containing-gas spraying nozzles (411b, 411d; 413b, 413d), wherein respective orifices of the respective nozzles face toward an inner surface of the combustion chamber, so as to spray a fuel-gas and an oxygen-containing-gas in a neighborhood of a tangential direction of an inner circumferential wall of the combustion chamber, and wherein the respective nozzles are disposed along at least one selected from the group consisting of a longitudinal direction and a circumferential direction; and switching valves (415a-415d; 416a-416d) disposed on supply-lines, wherein the supply valves are connected to the respective nozzles included in the tubular flame burner; characterized in that the combustion controller comprises: means for controlling on/off of the switching valves so as to select desired nozzles for spraying the fuel gas and the oxygen-containing gas to the combustion chamber and so that the spraying speed from the nozzles is maintained to be fallen within a predetermined range in accordance with the combustion load of the tubular flame burner, wherein an initial flow speed of the fuel gas and the oxygen-containing-gas sprayed to the combustion chamber in accordance with the combustion load is controlled to be fallen within a range between the maximal permissive speed (Vp) dependent upon the pressure-loss and the minimal flow speed(Vq) required for forming the tubular flame. a tubular combustion chamber whose front-end is open; and, a plurality of fuel-gas spraying nozzles (411a, 411c; 413a, 413c) and a plurality of oxygen-containing-gas spraying nozzles (411b, 411d; 413b, 413d), wherein respective orifices of the respective nozzles face toward an inner surface of the combustion chamber, so as to spray a fuel-gas and an oxygen-containing-gas in a neighborhood of a tangential direction of an inner circumferential wall of the combustion chamber, and wherein the respective nozzles are disposed along at least one selected from the group consisting of a longitudinal direction and a circumferential direction; and switching valves (415a-415d; 416a-416d) disposed on supply-lines, wherein the supply valves are connected to the respective nozzles included in the tubular flame burner; characterized in that the combustion controller comprises: means for controlling on/off of the switching valves so as to select desired nozzles for spraying the fuel gas and the oxygen-containing gas to the combustion chamber and so that the spraying speed from the nozzles is maintained to be fallen within a predetermined range in accordance with the combustion load of the tubular flame burner, wherein an initial flow speed of the fuel gas and the oxygen-containing-gas sprayed to the combustion chamber in accordance with the combustion load is controlled to be fallen within a range between the maximal permissive speed (Vp) dependent upon the pressure-loss and the minimal flow speed(Vq) required for forming the tubular flame. means for controlling on/off of the switching valves so as to select desired nozzles for spraying the fuel gas and the oxygen-containing gas to the combustion chamber and so that the spraying speed from the nozzles is maintained to be fallen within a predetermined range in accordance with the combustion load of the tubular flame burner, wherein an initial flow speed of the fuel gas and the oxygen-containing-gas sprayed to the combustion chamber in accordance with the combustion load is controlled to be fallen within a range between the maximal permissive speed (Vp) dependent upon the pressure-loss and the minimal flow speed(Vq) required for forming the tubular flame.