A rollable display device comprising: a flexible display panel configured to display an image; a housing configured to house the flexible display panel when the flexible display panel is rolled; and a guide part at an edge portion of the flexible display panel, wherein the flexible display panel comprises: a first flexible display panel portion configured to be kept inside the housing; and a second flexible display panel portion connected to the first flexible display panel portion and configured to be exposable to an outside of the housing, wherein the first flexible display panel portion is configured to remain inside the housing even after application of an external force to the flexible display panel when the second flexible display panel portion is fully unrolled, and wherein when the second flexible display panel portion is rolled inside the housing, the flexible display panel comprises a plurality of display panel layers, the plurality of display panel layers being spaced apart from each other; wherein the guide part comprises: a first guide part inside the housing and at an edge portion of the first flexible display panel portion; and a second guide part outside the housing and at an edge portion of the second flexible display panel portion. a flexible display panel configured to display an image; a housing configured to house the flexible display panel when the flexible display panel is rolled; and a guide part at an edge portion of the flexible display panel, wherein the flexible display panel comprises: a first flexible display panel portion configured to be kept inside the housing; and a second flexible display panel portion connected to the first flexible display panel portion and configured to be exposable to an outside of the housing, wherein the first flexible display panel portion is configured to remain inside the housing even after application of an external force to the flexible display panel when the second flexible display panel portion is fully unrolled, and wherein when the second flexible display panel portion is rolled inside the housing, the flexible display panel comprises a plurality of display panel layers, the plurality of display panel layers being spaced apart from each other; wherein the guide part comprises: a first guide part inside the housing and at an edge portion of the first flexible display panel portion; and a second guide part outside the housing and at an edge portion of the second flexible display panel portion. a first flexible display panel portion configured to be kept inside the housing; and a second flexible display panel portion connected to the first flexible display panel portion and configured to be exposable to an outside of the housing, wherein the first flexible display panel portion is configured to remain inside the housing even after application of an external force to the flexible display panel when the second flexible display panel portion is fully unrolled, and wherein when the second flexible display panel portion is rolled inside the housing, the flexible display panel comprises a plurality of display panel layers, the plurality of display panel layers being spaced apart from each other; wherein the guide part comprises: a first guide part inside the housing and at an edge portion of the first flexible display panel portion; and a second guide part outside the housing and at an edge portion of the second flexible display panel portion.