A mobile terminal comprising: a body comprising a first frame and a second frame configured to slidingly move relative to the first frame in the horizontal direction, causing a change from a first state to a second state in which the body is expanded, and a flexible display comprising a first area provided on a front surface of the body, a second area provided on a rear surface of the body and a third area between the first area and the second area and surrounding a curved side portion of the second frame, wherein the first frame comprises a plurality of first support portions, each of the plurality of first support portions extended in a horizontal direction and vertically spaced a preset distance apart from another one of the plurality of first support portions, and wherein the second frame comprises: a plurality of second support portions, each of the plurality of second support portions provided between respectively corresponding first support portions, a third support portion provided in a front side of the second area of the flexible display, and extended in parallel with the plurality of second support portions, and the curved side portion provided between a first end of the plurality of second support portions and a first end of the third support portion, wherein the second area of the flexible display is configured to slidingly move on the third support portion when the second frame slidingly moves a body comprising a first frame and a second frame configured to slidingly move relative to the first frame in the horizontal direction, causing a change from a first state to a second state in which the body is expanded, and a flexible display comprising a first area provided on a front surface of the body, a second area provided on a rear surface of the body and a third area between the first area and the second area and surrounding a curved side portion of the second frame, wherein the first frame comprises a plurality of first support portions, each of the plurality of first support portions extended in a horizontal direction and vertically spaced a preset distance apart from another one of the plurality of first support portions, and wherein the second frame comprises: a plurality of second support portions, each of the plurality of second support portions provided between respectively corresponding first support portions, a third support portion provided in a front side of the second area of the flexible display, and extended in parallel with the plurality of second support portions, and the curved side portion provided between a first end of the plurality of second support portions and a first end of the third support portion, wherein the second area of the flexible display is configured to slidingly move on the third support portion when the second frame slidingly moves a plurality of second support portions, each of the plurality of second support portions provided between respectively corresponding first support portions, a third support portion provided in a front side of the second area of the flexible display, and extended in parallel with the plurality of second support portions, and the curved side portion provided between a first end of the plurality of second support portions and a first end of the third support portion, wherein the second area of the flexible display is configured to slidingly move on the third support portion when the second frame slidingly moves