A refrigerator suppresses heat penetration into a chamber of the refrigerator from the outside through an open part. The refrigerator, includes: a heat-insulation box that has an open part, and a double structure including an outer box and an Inner box; a door that is engaged with the heat-insulation box; and a gasket that is located between the heat-insulation box and the door, wherein inner-box/outer-box-joint regions of the outer box and the inner box are located to an outer side of the heat-insulation box, and are located outward beyond door/heat-insulation-box-joint regions of the door and the heat-insulation box that are joined with each other.