To provide a Bourdon tube thermometer internal machine having no contact point, and hardly generating deterioration of performance, and also to provide a Bourdon tube thermometer with the internal machine installed therein.

In this Bourdon tube thermometer internal machine, a sector 6 is moved by motion of a tube tip of a Bourdon tube 32 via a rod 11, and a pinion 9 engaged with the sector 6 is rotated, and the motion is transferred to a pointer 28 piled into a pinion shaft, and displacement of the tube tip of the Bourdon tube 32 is enlarged and shown. The machine has a sensor mechanism including one or a plurality of sensors 16 for detecting motion of the sector 6, and a sensor passing shielding plate mechanism 7 passing a portion of the sensors 16 of the sensor mechanism is mounted on a sector shaft 8 of the sector 6.