HEAT INSULATION MEMBER AND COLD/HOT STORAGE BOX

摘要

PROBLEM TO BE SOLVED: To provide a heat insulation member which includes a heat insulation layer made of a vacuum heat insulation material and having the same thickness as the conventional one, and however has an excellent heat insulation property, and which can hold a sufficient heat insulation property even though a heat insulation layer made of a vacuum heat insulation material is made thinner.SOLUTION: A heat insulation member 1 includes at least a heat transfer material layer 4, a void layer 3 having an air layer 5 and a structure 6 for maintaining the air layer 5, and a heat insulation layer 2 made of a vacuum heat insulation material which are laminated in this order. The structure 6 is provided to allow communication in the thickness direction or the plane direction.