A refrigerator comprising: a body having a storage chamber; a first door pivotably provided at a front side of the storage chamber, the first door having an opening, and at least one door pocket provided at the opening; a second door pivotably provided at a front side of the first door, to open or close the opening, the second door pivoting in the same direction as the first door; a first upper hinge and a first lower hinge respectively coupled to top and bottom surfaces of the body, to pivotably support the first door; a second upper hinge and a second lower hinge respectively coupled to top and bottom surfaces of the first door, to pivotably support the second door; and wherein the second lower hinge is provided to be supported by the first lower hinge so that the load of the second door is sustained by the body and the first door, wherein the refrigerator further comprises a second door opening prevention device to prevent the second door from being unintentionally opened by a force generated when the first door is opened, wherein the second door opening prevention device comprises a striker coupled to the bottom surface of the second door, a latch coupled to the bottom surface of the first door, and an actuation bar which is rectilinearly moveable and is arranged to be pressed against the body of the refrigerator, wherein the latch is configured to hold the second door closed by engaging with the striker when the first door is in an open position, and is configured to be rotated to a released position by rectilinear movement of the actuation bar when the actuation bar is pressed against the body of the refrigerator. a body having a storage chamber; a first door pivotably provided at a front side of the storage chamber, the first door having an opening, and at least one door pocket provided at the opening; a second door pivotably provided at a front side of the first door, to open or close the opening, the second door pivoting in the same direction as the first door; a first upper hinge and a first lower hinge respectively coupled to top and bottom surfaces of the body, to pivotably support the first door; a second upper hinge and a second lower hinge respectively coupled to top and bottom surfaces of the first door, to pivotably support the second door; and wherein the second lower hinge is provided to be supported by the first lower hinge so that the load of the second door is sustained by the body and the first door, wherein the refrigerator further comprises a second door opening prevention device to prevent the second door from being unintentionally opened by a force generated when the first door is opened, wherein the second door opening prevention device comprises a striker coupled to the bottom surface of the second door, a latch coupled to the bottom surface of the first door, and an actuation bar which is rectilinearly moveable and is arranged to be pressed against the body of the refrigerator, wherein the latch is configured to hold the second door closed by engaging with the striker when the first door is in an open position, and is configured to be rotated to a released position by rectilinear movement of the actuation bar when the actuation bar is pressed against the body of the refrigerator.