A rollable display device comprising: first (101; 201) and second bodies; a display having an image display surface and a rear surface; a roller (103; 203) supported in the first body (101; 201), the roller (103; 203) configured to be rotatable around a rotation axis in a width direction of the display, to which one end portion of the display in a length direction of the display is fixed and around an outer circumference of which the display is wound; a support member having a plurality of segmented links connected to pivot around a hinge shaft perpendicular to the image display surface between an expanded state and a bent state in one direction, the support member being accommodated in an accommodation unit (151; 152) provided in the first body (101; 201), and a sprocket (195; 196) provided in the first body (101; 201) that is configured to rotate around a rotation axis perpendicular to the image display surface and that moves the support member, wherein the display is configured to be unwound from the roller (103; 203) and is configured to be unrolled outward from the first body (101; 201) to expand in the length direction as the first body (101; 201) is separated from the second body, wherein the support member is configured to be unrolled outward from the first body (101; 201) in the length direction to support the rear surface of the display as the first body (101; 201) is separated from the second body; and wherein the sprocket (195; 196) is configured to change a movement direction of the support member from the width direction to the length direction of the display when the support member is unrolled outward from the first body (101; 201), and from the length direction to the width direction of the display when the support member is rolled back into the first body (101; 201), wherein the support member is configured to support an edge in the width direction of the display, wherein the sprocket (195; 196) is disposed adjacent to the edge of the display, wherein a plurality of connection members having a first connection portion is provided at the edge of the display, and wherein a second connection portion configured to be connected to the first connection portion is provided at the plurality of segmented links, wherein the first connection portion and the second connection portion are configured to be connected to each other or disconnected from each other by the sprocket when a movement direction of the plurality of segmented links is changed between the length direction and the width direction. first (101; 201) and second bodies; a display having an image display surface and a rear surface; a roller (103; 203) supported in the first body (101; 201), the roller (103; 203) configured to be rotatable around a rotation axis in a width direction of the display, to which one end portion of the display in a length direction of the display is fixed and around an outer circumference of which the display is wound; a support member having a plurality of segmented links connected to pivot around a hinge shaft perpendicular to the image display surface between an expanded state and a bent state in one direction, the support member being accommodated in an accommodation unit (151; 152) provided in the first body (101; 201), and a sprocket (195; 196) provided in the first body (101; 201) that is configured to rotate around a rotation axis perpendicular to the image display surface and that moves the support member, wherein the display is configured to be unwound from the roller (103; 203) and is configured to be unrolled outward from the first body (101; 201) to expand in the length direction as the first body (101; 201) is separated from the second body, wherein the support member is configured to be unrolled outward from the first body (101; 201) in the length direction to support the rear surface of the display as the first body (101; 201) is separated from the second body; and wherein the sprocket (195; 196) is configured to change a movement direction of the support member from the width direction to the length direction of the display when the support member is unrolled outward from the first body (101; 201), and from the length direction to the width direction of the display when the support member is rolled back into the first body (101; 201), wherein the support member is configured to support an edge in the width direction of the display, wherein the sprocket (195; 196) is disposed adjacent to the edge of the display, wherein a plurality of connection members having a first connection portion is provided at the edge of the display, and wherein a second connection portion configured to be connected to the first connection portion is provided at the plurality of segmented links, wherein the first connection portion and the second connection portion are configured to be connected to each other or disconnected from each other by the sprocket when a movement direction of the plurality of segmented links is changed between the length direction and the width direction.