Air-cooled gas turbine

A high efficiency coolant collection type gas turbine is obtained by forming coolant supply and collection flow paths for moving blades in a more outer peripheral side of a gas turbine rotor than a hub, supplying the coolant supplied from a shaft end into the moving blades through the supply flow path and collecting the coolant after cooling the blades and supplying to coolant into a combustion chamber side. For this purpose a distant piece is provided between the compressor and the turbine. A spacer is inserted between the distant piece and the disc of the first turbine stage. A flowpath formed by a cavity between the distant piece and the spacer is lined with heat shielding material in order to protect the structure from high temperatures.