Refrigerator comprising: a self-supporting cabinet which is structured for stably resting on the floor/ground, has a thermal-insulating structure and is provided with at least one, inner thermal-insulated storage cavity (3, 4) that is adapted to accommodate perishable foodstuff and communicates with the outside via an access opening located on a main face/wall of the cabinet; the self-supporting cabinet, in turn, comprising: a rigid boxlike outer casing that forms the outside of said self-supporting cabinet; a tub-shaped, rigid inner shell which is stably fitted/recessed into the outer casing so as to form the inside of the cabinet and delimits said at-least-one inner storage cavity (3, 4); and a thermal-insulating stuffing which is interposed between the inner shell and the outer casing to minimize the heat exchange with the outside; the rigid boxlike outer casing including a number of rigid platelike panels (15, 16, 17, 18, 19) that are placed side-by-side to one another and are firmly fixed/attached to one another and/or to the beneath-located thermal-insulating stuffing, so as to form the outer walls of the self-supporting cabinet; wherein at least one (15, 18, 19) of said platelike panels (15, 16, 17, 18, 19) includes a metal plate having, along its perimeter edge, at least one, outwards-extending slopped flap that overlaps and stably couples to a slopped sidewall of a corresponding receiving groove formed on a corresponding rigid supporting framework which is located beneath said rigid metal plate and stably supports the same rigid metal plate the refrigerator being characterized in that the tilt angle β of the slopped sidewall of the receiving groove with respect to the lying plane P of the metal plate is lower than 90° and the bending angle α of the slopped flap of metal plate, in turn, is lower than 90° so that when the slopped flap lies on the slopped sidewall, substantially matches with the tilt angle β of the slopped sidewall, wherein said oblong slopped flap is plastically deformed, over the slopped sidewall of the receiving groove, so as to match the pitch of said slopped sidewall, wherein the bending angle (α) of the slopped flap of the metal plate is greater than the tilt angle (β) of the slopped sidewall of the receiving groove, wherein preferably the bending angle (α) of the slopped flap of the metal plate with respect to the lying plane of the metal plate ranges between 60° and 80°. the self-supporting cabinet, in turn, comprising: a rigid boxlike outer casing that forms the outside of said self-supporting cabinet; a tub-shaped, rigid inner shell which is stably fitted/recessed into the outer casing so as to form the inside of the cabinet and delimits said at-least-one inner storage cavity (3, 4); and a thermal-insulating stuffing which is interposed between the inner shell and the outer casing to minimize the heat exchange with the outside; the rigid boxlike outer casing including a number of rigid platelike panels (15, 16, 17, 18, 19) that are placed side-by-side to one another and are firmly fixed/attached to one another and/or to the beneath-located thermal-insulating stuffing, so as to form the outer walls of the self-supporting cabinet; wherein at least one (15, 18, 19) of said platelike panels (15, 16, 17, 18, 19) includes a metal plate having, along its perimeter edge, at least one, outwards-extending slopped flap that overlaps and stably couples to a slopped sidewall of a corresponding receiving groove formed on a corresponding rigid supporting framework which is located beneath said rigid metal plate and stably supports the same rigid metal plate the refrigerator being characterized in that the tilt angle β of the slopped sidewall of the receiving groove with respect to the lying plane P of the metal plate is lower than 90° and the bending angle α of the slopped flap of metal plate, in turn, is lower than 90° so that when the slopped flap lies on the slopped sidewall, substantially matches with the tilt angle β of the slopped sidewall, wherein said oblong slopped flap is plastically deformed, over the slopped sidewall of the receiving groove, so as to match the pitch of said slopped sidewall, wherein the bending angle (α) of the slopped flap of the metal plate is greater than the tilt angle (β) of the slopped sidewall of the receiving groove, wherein preferably the bending angle (α) of the slopped flap of the metal plate with respect to the lying plane of the metal plate ranges between 60° and 80°.