FIG. 18 is a perspective view illustrating an electronic device (e.g., the electronic device 100 of FIGS. 1 to 3) according to an embodiment, wherein most of a flexible display (e.g., the display 103 of FIGS. 1 to 3) is exposed to the outside of a second structure (e.g., the second structure 102 of FIGS. 1 to 3). FIG. 19 is a perspective view illustrating a state in which the flexible display 103 is removed from the electronic device 100 of FIG. 18. FIG. 20 is a cross-sectional view illustrating an electronic device 100 according to an embodiment, wherein most of a flexible display 103 is exposed to the outside of a second structure 102. FIG. 21 is an enlarged, cross-sectional view illustrating a portion of FIG. 20.