An electronic device (100; 300; 400; 500) comprising: a first non-modifiable section (110; 310; 410; 510) which is one portion of an electronic device housing and has a fixed and retained shape; a modifiable section (120; 320; 420; 520) which is another portion of the electronic device housing, extends from the first non-modifiable section (110; 310; 410; 510), and is capable of being bent and deformed in one direction; a second non-modifiable section (130; 430; 530) which is still another portion of the electronic device housing, extends from the modifiable section (120; 320; 420; 520), and is formed to be smaller than the first non-modifiable section (110; 310; 410; 510); a flexible display (140; 440; 540) disposed on one surface throughout the first non-modifiable section (110; 310; 410; 510), the modifiable section (120; 320; 420; 520), and the second non-modifiable section (130; 430; 530), wherein one end of the flexible display (140; 440; 540) is fixed to the first non-modifiable section (110; 310; 410; 510); an elastic plate (150; 350; 450; 550) disposed on the other surface throughout the first non-modifiable section (110; 310; 410; 510), the modifiable section (120; 320; 420; 520), and the second non-modifiable section (130; 430; 530), wherein one end of the elastic plate (150; 350; 450; 550) is fixed to the second non-modifiable section (130; 430; 530) and the other end of the elastic plate (150; 350; 450; 550), disposed throughout the modifiable section (120; 320; 420; 520) and the first non-modifiable section (110; 310; 410; 510), is configured to move slidingly; and a shape-fixing part (360; 460; 560) provided in the first non-modifiable section (110; 310; 410; 510) and configured to fix the position of the other end of the elastic plate (150; 350; 450; 550), that is configured to move slidingly, so as to retain a bending deformation state or a straight state of the modifiable section (120; 320; 420; 520), characterized in that the other end of the flexible display (140; 440; 540), disposed throughout the modifiable section (120; 320; 420; 520) and the second non-modifiable section (130; 430; 530), is configured to move slidingly; and the elastic plate (150; 350; 450; 550) is configured to provide an elastic restoring force to restore the modifiable section (120; 320; 420; 520) to a deformation state of being worn on a human body. a first non-modifiable section (110; 310; 410; 510) which is one portion of an electronic device housing and has a fixed and retained shape; a modifiable section (120; 320; 420; 520) which is another portion of the electronic device housing, extends from the first non-modifiable section (110; 310; 410; 510), and is capable of being bent and deformed in one direction; a second non-modifiable section (130; 430; 530) which is still another portion of the electronic device housing, extends from the modifiable section (120; 320; 420; 520), and is formed to be smaller than the first non-modifiable section (110; 310; 410; 510); a flexible display (140; 440; 540) disposed on one surface throughout the first non-modifiable section (110; 310; 410; 510), the modifiable section (120; 320; 420; 520), and the second non-modifiable section (130; 430; 530), wherein one end of the flexible display (140; 440; 540) is fixed to the first non-modifiable section (110; 310; 410; 510); an elastic plate (150; 350; 450; 550) disposed on the other surface throughout the first non-modifiable section (110; 310; 410; 510), the modifiable section (120; 320; 420; 520), and the second non-modifiable section (130; 430; 530), wherein one end of the elastic plate (150; 350; 450; 550) is fixed to the second non-modifiable section (130; 430; 530) and the other end of the elastic plate (150; 350; 450; 550), disposed throughout the modifiable section (120; 320; 420; 520) and the first non-modifiable section (110; 310; 410; 510), is configured to move slidingly; and a shape-fixing part (360; 460; 560) provided in the first non-modifiable section (110; 310; 410; 510) and configured to fix the position of the other end of the elastic plate (150; 350; 450; 550), that is configured to move slidingly, so as to retain a bending deformation state or a straight state of the modifiable section (120; 320; 420; 520), characterized in that the other end of the flexible display (140; 440; 540), disposed throughout the modifiable section (120; 320; 420; 520) and the second non-modifiable section (130; 430; 530), is configured to move slidingly; and the elastic plate (150; 350; 450; 550) is configured to provide an elastic restoring force to restore the modifiable section (120; 320; 420; 520) to a deformation state of being worn on a human body.