To provide a refrigerator which further improves strength of a side wall of a machine room and unfailingly prevents deformation caused when being dropped.

A refrigerator 1 includes: a heat insulation box body 2 which is filled with a foam heat insulation material 2c to form a storage room; and a machine room 6 where a compressor 31 for operating a refrigeration cycle, a condenser 15 disposed at a high temperature part of the refrigeration cycle, and a blower fan 13 which cools the compressor 31 and the condenser 15 are disposed. In the refrigerator 1, a side wall 17 of the machine room 6 is formed by filling a space between an extension part 7a formed by extending a side surface plate 7 of the heat insulation box body 2 and a side wall member 25 facing the extension part 7a with the foam heat insulation material 2c, and a penetrating port 17a penetrating through the side wall of the machine room 6 is provided.