An electronic device (100, 300, 400, 1002, 1004) comprising: a first structure (110, 310, 410) comprising a first plate (311, 411); a second structure (120, 320, 420) comprising a second plate (321, 421) that is slidable relative to the first structure (110, 310, 410); a flexible display (111, 330, 430), at least portion of which is configured to move together with the first structure (110, 310, 410); a camera device including a lens and disposed between at least the first structure (110, 310, 410) and the second structure (120, 320, 420); and a processor functionally connected to the camera device; wherein the flexible display (111, 330, 430) is configured to expand or reduce a front display area (1111, 4111) visually exposed at a front surface of the electronic device (100, 300, 400, 1002, 1004) based on a sliding operation between the first structure (110, 310, 410) and the second structure (120, 320, 420), wherein the electronic device (100, 300, 400, 1002, 1004) is configured to be transitioned between a closed state in which a size of the front display area (1111, 4111) is a first size and an open state in which the size of the front display area (1111, 4111) is a second size larger than the first size as the first structure (110, 310, 410) moves a specified distance in a first direction with respect to the second structure (120, 320, 420), wherein the flexible display (111, 330, 430) comprises a planar portion extending across at least a portion of the first plate (311, 411) and mounted thereon and a bendable portion extending from the planar portion to a space between the second structure (120, 320, 420) and the first structure (110, 310, 410) in the closed state, wherein the camera device is configured to rotate between the first structure (110, 310, 410) and the second structure (120, 320, 420) when the electronic device (100, 300, 400, 1002, 1004) is transitioned from the closed state to the open state and/or from the open state to the closed state, and wherein the first plate (311, 411) includes a first surface and a second surface (3112, 4112) facing opposite to the first surface, and the second plate (321, 421) faces the second surface (3112, 4112) of the first plate (311, 411), wherein the first plate (311, 411) includes a first aperture (422, 431, 435, 453) configured to support an angle of view of the lens facing in front of the electronic device when the electronic device is in the closed state, and the second plate (321, 421) includes a second aperture (422, 431, 435, 453) configured to support an angle of view of the lens facing rearward of the electronic device when the electronic device is in the open state. a first structure (110, 310, 410) comprising a first plate (311, 411); a second structure (120, 320, 420) comprising a second plate (321, 421) that is slidable relative to the first structure (110, 310, 410); a flexible display (111, 330, 430), at least portion of which is configured to move together with the first structure (110, 310, 410); a camera device including a lens and disposed between at least the first structure (110, 310, 410) and the second structure (120, 320, 420); and a processor functionally connected to the camera device; wherein the flexible display (111, 330, 430) is configured to expand or reduce a front display area (1111, 4111) visually exposed at a front surface of the electronic device (100, 300, 400, 1002, 1004) based on a sliding operation between the first structure (110, 310, 410) and the second structure (120, 320, 420), wherein the electronic device (100, 300, 400, 1002, 1004) is configured to be transitioned between a closed state in which a size of the front display area (1111, 4111) is a first size and an open state in which the size of the front display area (1111, 4111) is a second size larger than the first size as the first structure (110, 310, 410) moves a specified distance in a first direction with respect to the second structure (120, 320, 420), wherein the flexible display (111, 330, 430) comprises a planar portion extending across at least a portion of the first plate (311, 411) and mounted thereon and a bendable portion extending from the planar portion to a space between the second structure (120, 320, 420) and the first structure (110, 310, 410) in the closed state, wherein the camera device is configured to rotate between the first structure (110, 310, 410) and the second structure (120, 320, 420) when the electronic device (100, 300, 400, 1002, 1004) is transitioned from the closed state to the open state and/or from the open state to the closed state, and wherein the first plate (311, 411) includes a first surface and a second surface (3112, 4112) facing opposite to the first surface, and the second plate (321, 421) faces the second surface (3112, 4112) of the first plate (311, 411), wherein the first plate (311, 411) includes a first aperture (422, 431, 435, 453) configured to support an angle of view of the lens facing in front of the electronic device when the electronic device is in the closed state, and the second plate (321, 421) includes a second aperture (422, 431, 435, 453) configured to support an angle of view of the lens facing rearward of the electronic device when the electronic device is in the open state.