Electronic device including display with bent area

An electronic device comprising:

• a front window forming at least part of a front surface of the electronic device, the front window comprising a planar portion, a first bent portion, and a second bent portion, the first bent portion and the second bent portion being bent in opposite directions from the planar portion;
• a flexible display module comprising a planar display portion visible via the planar portion of the front window, a first bent display portion visible via the first bent portion of the front window, and a second bent display portion visible via the second bent portion of the front window;
• and
• a metal housing disposed along an outer periphery of the electronic device, the metal housing comprising a first side portion and a second side portion opposite the first side portion, an upper portion and a lower portion opposite the upper portion, the first side portion and the second side portion having a first height, and the upper portion and the lower portion having a second height greater than the first height,
• wherein in a corner where the first side portion and the upper portion are interconnected, and in a corner where the first side portion and the lower portion are interconnected, a height of the first side portion gradually increases from the first height to the second height.