The present invention relates to an insulation structure for the internal insulation of a vehicle. The insulation structure is improved in such a way that using it a fire incursion of the flames of a source of fire acting from outside the vehicle environment into the vehicle interior is excluded as much as possible, an increase of the fire protection safety for separate interior regions lying proximal to a structure external skin being implemented by the type of the film insulation of the insulation package. The insulation structure comprises an insulation package (3), in which an insulation core (1) is embedded, and a film (11). The insulation package (3) is positioned inside an intermediate space which encloses internal paneling and an external skin. It is completely enclosed by the film (11). The film (11) is implemented using a burn-through safe film material, which is an obstruction to a flaming fire, to which a film surface region of this film is subjected during an occurring fire catastrophe.