To provide a refrigerator capable of surely preventing intrusion of a heat load from the outside of the refrigerator, and not causing dispersion and variation of its inside temperature.

In this refrigerator receiving a cooling refrigerant from a refrigerating machine 2 to keep the inside of a refrigerator body 1 at a prescribed temperature, a latent heat cooling storage material 5 is disposed on an inner wall surface of the refrigerator body 1, and the latent heat of the latent heat cooling storage material 5 is controlled by the refrigerating machine 2, thus the heat load intruding into the refrigerator through the refrigerator body 1 is surely absorbed by the latent heat change in a state that the latent heat cooling storage material 5 which is disposed on the inner wall surface and of which the latent heat is controlled by the refrigerating machine 2, is solidified, and the inside temperature is not largely changed as is found in sensible heat change.