In the probe module for evaluating the internal temperature of a specimen in a high enthalpy arc heating plasma wind tunnel device according to the present invention, the probe module is detachably coupled to a specimen probe arm constituting a rotary transfer device disposed in the vacuum chamber. Specimen probe 110; a thermocouple fixing tube 120 disposed along the inside of the specimen probe 110; a thermocouple 130 embedded through the thermocouple fixing tube 120 ; a tension adjusting screw 140 disposed on the thermocouple connecting passage 20 formed in the specimen probe arm 10 and having a function of adjusting an appropriate tension between the thermocouple 130 and the specimen; a specimen connection adapter 160 detachably coupled to the open front end of the specimen probe 110; and a specimen 170 coupled to the front end of the specimen connection adapter 160; a cooling water inlet and outlet for inflow and outflow of cooling water is formed on the outer peripheral surface of the specimen probe 110 coupled to the specimen probe arm, and the specimen In the case of replacing the damaged thermocouple after measuring the internal temperature of And it is characterized in that it enables the replacement of the specimen.
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