PROBLEM TO BE SOLVED: To improve workability when a sample is placed on a mounting plate or taken out from the mounting plate. SOLUTION: A heating furnace 1, 10 and a mounting portion 8a for mounting a minute sample on the heating furnace 1, 10 and a position and a mounting portion 8a for accommodating the mounting portion 8a inside the heating furnace 1, 10 are provided. It is a differential thermal / thermogravimetric simultaneous measuring device including a heating furnace moving unit 2 for moving the heating furnaces 1 and 10 to and from a position where the heating furnaces 1 and 10 are exposed to the outside, and is heated from the viewpoint of an operator who operates the device. A work auxiliary table 6 made of a heat-resistant material is provided on the front side of the furnaces 1 and 10 and at a position lower than the mounting portion 8a. [Selection diagram] Fig. 1
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