BURNER

PROBLEM TO BE SOLVED: To expand operation degree of a gas turbine by suppressing the generation of combustion vibration.SOLUTION: The burner includes: a burner outer cylinder 2; a cylindrical burner inner cylinder 3 provided inside the burner outer cylinder 2; a compressed air flow channel 7 demarcated between the burner outer cylinder and the burner inner cylinder; and a plurality of fuel nozzles 5, 6 provided inside the burner inner cylinder 3, the compressed air flowing through the compressed air flow channel 7 being substantially reversed in flow direction in the end of the burner inner cylinder and led into the plurality of fuel nozzles. The compressed air flow channel 7 is provided with a fuel injection peg including an upstream fuel injection peg 19 for injecting upstream fuel and a downstream fuel injection peg 20 for injecting downstream fuel, and is configured so that upstream fuel concentration fluctuations caused by pressure fluctuations in the burner reduce the peak of downstream fuel concentration fluctuations in the burning initiation position of the burner.