PURPOSE: To adsorb moisture in a space and to prevent corrosion of a cooling pipe by interposing a moisture absorber between a heat conductive plate and an inner box in a heat insulation box in which the pipe is mounted at a heat insulator side of an inner box via a heat conductive plate, etc., and a foamed heat insulator is filled between the inner box and an outer box.

CONSTITUTION: A refrigerator has cooling pipes 3, 7 in an enclosed space formed between a surface of an inner box 1 of a heat insulator 8 side and a heat conductive plate 2, and comprises a moisture absorber 4 formed by using, for example, silica gel to be used as a dehydrating agent, desiccant and having strong adsorption power for various substances and mounted by superposing on and sticking to the pipe 3. Thus, moisture permeated through a box 3 made of a synthetic resin to the insulator 8 side, i.e., the pipes 3, 7 side is adsorbed, thereby effectively preventing corrosion of the pipes 3, 7.