Gas turbine combustor

A gas turbine combustor having a combustion chamber for mixing a gas and air together to burn the gas, and a burner disposed upstream of the combustion chamber for supplying a gas and air to an interior of the combustion chamber to hold a flame, wherein:

• the burner is provided with a first swirler comprising a gas hole and an air hole alternately formed in a circumferential direction thereof;
• a first gas from a first gas source is supplied to the gas hole in the first swirler and air is supplied to the air hole;
• and
• a swiveling flow path is formed in the gas hole and the air hole in the burner to swivel the gas and the air and supply the gas and the air to the interior of the combustion chamber, a second gas hole is formed in the swiveling flow path in at least one of the air hole and the gas hole, and a second gas from a second gas source is supplied through the second gas hole.