A rollable display apparatus comprising: a rolling drum; and a flexible display panel comprising a first end bonded to the rolling drum, the flexible display panel being windable around an outer circumferential surface of the rolling drum, wherein the flexible display panel comprises: a flexible substrate including a first surface on which a display device is arranged; a first protection film over the first surface of the flexible substrate; wherein the first protection film comprises a first layer comprising an elastic polymer, and a second layer on the first layer and having a smaller surface frictional force than the first layer, wherein the second layer comprises a plurality of first grooves each indented in a depth direction of the second layer from a surface of the second layer characterised in that the flexible display panel further comprises: an encapsulation member located between the flexible substrate and the first protection film and encapsulating the display device; and an adhesion layer bonding the first protection film and the encapsulation member, wherein the encapsulation member comprises at least one organic layer and at least one inorganic layer. a rolling drum; and a flexible display panel comprising a first end bonded to the rolling drum, the flexible display panel being windable around an outer circumferential surface of the rolling drum, wherein the flexible display panel comprises: a flexible substrate including a first surface on which a display device is arranged; a first protection film over the first surface of the flexible substrate; wherein the first protection film comprises a first layer comprising an elastic polymer, and a second layer on the first layer and having a smaller surface frictional force than the first layer, wherein the second layer comprises a plurality of first grooves each indented in a depth direction of the second layer from a surface of the second layer characterised in that the flexible display panel further comprises: an encapsulation member located between the flexible substrate and the first protection film and encapsulating the display device; and an adhesion layer bonding the first protection film and the encapsulation member, wherein the encapsulation member comprises at least one organic layer and at least one inorganic layer. a flexible substrate including a first surface on which a display device is arranged; a first protection film over the first surface of the flexible substrate; wherein the first protection film comprises a first layer comprising an elastic polymer, and a second layer on the first layer and having a smaller surface frictional force than the first layer, wherein the second layer comprises a plurality of first grooves each indented in a depth direction of the second layer from a surface of the second layer characterised in that the flexible display panel further comprises: an encapsulation member located between the flexible substrate and the first protection film and encapsulating the display device; and an adhesion layer bonding the first protection film and the encapsulation member, wherein the encapsulation member comprises at least one organic layer and at least one inorganic layer. an encapsulation member located between the flexible substrate and the first protection film and encapsulating the display device; and an adhesion layer bonding the first protection film and the encapsulation member, wherein the encapsulation member comprises at least one organic layer and at least one inorganic layer.