PROBLEM TO BE SOLVED: To prevent generation of inclination of an output shaft so as to improve stability by vertically arranging an output shaft of an output turbine, and supporting the whole of an intermediate passage external casing to a base plate on a foundation rigidly, in a gas turbine formed by connecting a gas generator and the output turbine in a vertically L-letter shape. ;SOLUTION: An output shaft 53 of an output turbine 52 is vertically arranged, and an intermediate passage external casing 54 arranged a lower part of the turbine 52 is supported to a base plate 55 of a foundation. The output shaft is moved nearly vertically upward by heat extension of the casing 54. An intake pipe 57 and a gas generator 58 are arranged in a horizontal direction, and are connected to each other at both end parts 59a, 59b of the casing 54 together with the turbine 52 arranged in the vertical direction. An intermediate passage inner casing 61 is flexibly supported from the external casing 54 toward a center of the output shaft 53 at a position on a horizontal surface including an axial center of the gas generator 58, and an upstream end and a downstream end of the inner casing 61 are fitted to each other to the gas generator 58 and the turbine 52 while maintaining friction.;COPYRIGHT: (C)1998,JPO
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