Patent ID: 8506251

Claim:
A gas turbine blade in which cooling channels are formed inside the turbine blade, and the turbine blade is cooled by causing cooling air to circulate through the cooling channels, wherein the cooling channels comprise: a plurality of straight channel-like base-side elongated holes that extend in a longitudinal direction at a base side of the turbine blade, a plurality of straight channel-like tip-side elongated holes that extend in a longitudinal direction at a tip side of the turbine blade, and a plurality of communicating hollow portions that are interposed at connection portions between the base-side elongated holes and the tip-side elongated holes to individually allow the two types of elongated holes to communicate with each other, and that have larger cross-sectional areas than the channel cross-sectional areas of the two types of elongated holes, wherein the communicating hollow portions are formed so as to match the position of a platform portion of the turbine blade, and wherein, among the plurality of the communicating hollow portions, the communicating hollow portions that are adjacent to each other are set at different heights.