To solve a problem temperatures of a conventional vehicle interior, an external wall material of a building material, a roof material, a battery or the like rise to approximately 60 to 83°C by solar summer heat and falls to approximately 2 to -10°C by winter cold heat, consequently, other than the battery, electricity, gas, petroleum or the like becomes necessary for heating and cooling, thus causing global warming, and energy saving becomes difficult, and the battery is deteriorated in performance due to the heating and cooling, and a period in the use of the battery is shortened and so forth.

A vehicle interior material, a building material, a battery case and a battery cover where the solar summer heat of about 60 to 83°C is reduced through a heat insulation material, and the winter cold heat of about 2 to -10°C is increased through the heat insulation material are provided by mixing rubber with a composite heat storage material injected with a heat storage material into a fine capsule to mold it into the vehicle interior material, the building material, the battery case and the battery cover.