To propose a concrete configuration of a connection section between a Bourdon tube formed by copper or a copper alloy and a conduit.

The Bourdon tube 2 used for a pressure-gauge type thermometer is formed by copper or a copper alloy and is formed substantially into an arc shape, with a prescribed center of curvature as the center. In the Bourdon tube 2, a collapse part 2a formed by collapsing a middle position in a first direction substantially orthogonal to a circumferential direction with the center of curvature as the center and a flat direction of the Bourdon tube 2 in a flat direction, and a fluid-filling section 2b, where a space for filling that is disposed across in a first direction and is filled with fluid, is formed inside are formed. At one end side of the Bourdon tube 2 in a circumferential direction, a conduit insertion section 2d to which a conduit is inserted is connected to the fluid-filling section 2b for formation. The internal diameter of a conduit insertion section 2d is larger than that of the fluid filling section 2b and is of a size that corresponds to the outside diameter of the conduit.