Disclosed is a vacuum thermal insulator for vehicles that has excellent sound insulation and thermal insulation performance and is easy to process and mold the shape of a part, the vacuum thermal insulator including a thermal insulator, a support disposed in the thermal insulator and configured to maintain the product shape of the vacuum thermal insulator, and an outer shell material configured to surround the thermal insulator and joined to the outer surface of the thermal insulator in a vacuum compressed state to seal and maintain an internal space in which the thermal insulator and the support are accommodated in a vacuum.

A vehicular body structure includes a body panel and an interior component. The interior component includes a base member, a skin layer disposed on a vehicular interior side of the base member and configured as a design surface of a vehicular compartment, and an infrared reflection layer that is configured as a most vehicular exterior side layer of the interior component and for reflecting infrared radiation entering from a body panel side. The base member is made of thermosetting resin material. The infrared reflection layer includes scary metal flakes that are electrically conductive and non-electrically conductive resin that holds the scary metal flakes to be parallel to each other and to be overlapped in a thickness direction. The interior component is mounted on the body panel with a portion of the infrared reflection layer being in contact with the body panel.