PURPOSE: To be no leakage of air from a ceramic part, besides to make a probe main body close to the ceramic part with suitable pressing force from a stop condition of an engine to the maximum output condition, and to settle a temperature sensor to a fixed position as well.

CONSTITUTION: A first bellows fixed one end part to a probe main body 19 and extending along the top end side of a probe main body 17, the other end part to fix the same to a gas turbine device main body 1 and a second bellows fixed one end part to the probe main body 17 and extending along the rear end side of the probe main body 17, the other end part to fix the same to the gas turbine device main body 1 are provided to a gas temperature measuring probe close to a probe close contacting seat the top end of the probe main body 19 besides penetrating the probe close contacting seat a temperature sensor 20 to be arranged to a temperature measuring position. A feature of this device is that pressure from a compressor 7 is introduced into the interior of these, besides the probe main body 17 is energized to the top end side with a spring. Load applied to the probe close contacting seat from the top end part of the probe main body 17 is always made only suitable pressing force thereby.