PURPOSE: To effectively cool the extreme end part of the trailing edge of a blade which could not be hitherto adquately cooled, in the hollow moving blade of a gas turbine having cooling air passages therein.

CONSTITUTION: A plurality of cooling air passages 3A, 3B, 3C having air outlets 2A', 2B', 2C' on the trailing edge part of a blade are provided in the hollow moving blade of a gas turbine, and the air outlets 2A', 2B', 2C' are arranged side by side in the radial direction of the blade. Further, return flow cooling air passages in which cooling air is alternately flowed zigzag inward and outward in the radial direction of the blade, are provided in the hollow moving blade, and partition plates to deflect a part of cooling air to the extreme end part of the blade, are provided on the parts of the air outlets 2A', 2B', 2C'.