Thermal insulation structure and structure

A thermal insulation structure, comprising:

• a thermal insulation film;
• and
• a plurality of support members that supports the thermal insulation film, wherein
• the thermal insulation film is supported by the support member in a state where tension is applied in an in-plane direction of the thermal insulation film,
• the support member includes a first portion and a second portion that are separated from each other, and one or more third portion that connects the first portion and the second portion, and a length of the third portion in an extending direction of the third portion is longer than a distance between the first portion and the second portion,
• the first portion and the second portion are disposed along a direction intersecting a surface of the thermal insulation film,
• the support member is elastically deformable in the direction intersecting the surface of the thermal insulation film,
• at least a part of the thermal insulation film is bent or the thermal insulation film is provided with a cut portion such that the thermal insulation film is capable of being extended between the support members, and
• the thermal insulation structure comprises a pair of the third portions and the third portions having a spiral shape.