PROBLEM TO BE SOLVED: To provide a gas turbine combustor further reduced in NOx exhaust amount.
SOLUTION: This gas turbine combustor includes: an inner cylinder 4 partitioning a combustion chamber; a plurality of fuel nozzles 5 provided at the upstream side of the inner cylinder 4 to inject fuel; and a plurality of porous plates having a plurality of air holes disposed between the fuel nozzle 5 and the inner cylinder, wherein the porous plates are constituted of a first porous plate 6 having air holes at positions opposite to the fuel nozzles and a second porous plate 7 provided at the downstream side through a gap with the first porous plate. The plurality of fuel nozzles 5 and the first porous plate 6 form a porous coaxial jet stream, and the porous coaxial jet stream is made to collide with the wall surface of the second porous plate 7 and diffused to thereby promote the mixing degree of fuel and combustion air, whereby on the downstream from the second porous plate 7, the fuel and the combustion air can be mixed at a moderate ratio to perform combustion.
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