PURPOSE: To minimize heat diffusion quantity from the corner part of a casing which forms a structure by accommodating a vacuum heat insulation panel, and simplify a process of a installing the vacuum heat insulation panel onto the casing.

CONSTITUTION: In a vacuum heat insulation panel 1 whose inside is vacuum- exhausted by charging a filler 5 in a space surrounded by surface material 2 consisting of a pair of flat main surface members 3 placed at a distance from each other and their and surface members 4, at least a portion of the end member 4 is inclined to the main surface member 3. A plurality of the vacuum heat insulation panels 1 are disposed, brought into contact with the inner wall surface of a casing 7, which is of a rectangular parallelepiped shape, so that the end surface members 4 may be overlapped on each other at a corner of the casing 7. At appropriate locating in the inner surface of the vacuum heat insulation panel 1 facing each other, presser metal fittings 8 are disposed so that they may face each other, and a pressing means 10 is provided between the presser metal fittings 8, 8 facing each other.