A refrigerator comprising: a cabinet having a first storage compartment, a second storage compartment (5, 5', 5") under the first storage compartment and a thermally insulative separation wall configured for separating the first and second storage compartments (4, 5, 5', 5") from each other, and a first door and a second door hinged to the left side and the right side of the cabinet respectively for closing and opening the first storage compartment, wherein the second storage compartment (5, 5', 5") is also closed or opened by means of the first door and the second door, wherein the thermally insulative separation wall contains a thermal insulation material inside, and further comprising a first covering structure for covering a gap between opposing side surfaces (26a, 26b) of the first door and the second door at the first storage compartment and a second covering structure for covering a gap between opposing side surfaces (26a, 26b) of the first door and the second door at the second storage compartment, the first and second covering structures being formed separately from each other or integrally with each other, wherein, when the first door and the second door are closed, a front end face of the separation wall contacts the back sides of the first door and the second door and wherein either i) the first covering structure and/or the second covering structure are each formed by a longitudinal bar connected to the first door or the second door or ii) wherein the first covering structure and/or the second covering structure are each formed by a vertical covering wall (52, 55) exposed to a front end of a corresponding one of the compartments (4, 5). a cabinet having a first storage compartment, a second storage compartment (5, 5', 5") under the first storage compartment and a thermally insulative separation wall configured for separating the first and second storage compartments (4, 5, 5', 5") from each other, and a first door and a second door hinged to the left side and the right side of the cabinet respectively for closing and opening the first storage compartment, wherein the second storage compartment (5, 5', 5") is also closed or opened by means of the first door and the second door, wherein the thermally insulative separation wall contains a thermal insulation material inside, and further comprising a first covering structure for covering a gap between opposing side surfaces (26a, 26b) of the first door and the second door at the first storage compartment and a second covering structure for covering a gap between opposing side surfaces (26a, 26b) of the first door and the second door at the second storage compartment, the first and second covering structures being formed separately from each other or integrally with each other, wherein, when the first door and the second door are closed, a front end face of the separation wall contacts the back sides of the first door and the second door and wherein either i) the first covering structure and/or the second covering structure are each formed by a longitudinal bar connected to the first door or the second door or ii) wherein the first covering structure and/or the second covering structure are each formed by a vertical covering wall (52, 55) exposed to a front end of a corresponding one of the compartments (4, 5).