A gas turbine combustor includes a plurality of fuel nozzles, an air hole plate, a plate lip that covers an outer circumference side of the air hole plate, and an outer channel that supplies compressed air to an outer circumferential part of a portion on the plate lip side of the combustion chamber. The outer circumferential surface of the air hole plate includes a first surface joined to the plate lip and a second surface located further on the radial direction inner side of the air hole plate than the first surface to form a space between the second surface and the inner circumferential surface of the plate lip. A communicating hole that communicates the outer channel and the space is provided in the plate lip.