The present invention inhibits the decrease in the cooling efficiency of the exhaust frame.
And the exhaust frame 4 inner casing (9A) and inner casing (9A), the inner peripheral diffuser (10A) that forms a cooling passage (16) the inner circumference of the annular connected to the last-stage wheel space (21) between the, the inner circumference of the outer casing (9B) forming the outer diffuser (10B) and the outer peripheral diffuser (10B) outer cooling passage 19 of the annular between the forming the exhaust passage (18) between the diffuser (10A), the exhaust with the box connecting the struts 11, the inner peripheral diffuser (10A) and the outer peripheral diffuser (10B) connecting the inner casing (9A) and the outer casing (9B) over a passage (18), between the struts (11) the center line of the inner cooling passage 16 and the outer cooling channel strut cover forms a contact of the annular flow path 22 for connecting (19) (12), the strut (11) in the flow direction of the combustion gas (7) X first of all having a communication hole 24 formed in the outer peripheral wall surface of the downstream-side cooling passage 19 at the position.