Electronic device including flexible display

An electronic device, comprising:

• a first housing;
• a second housing configured to be movable relative to the first housing;
• a flexible display including a first area disposed on the first housing and a second area extending from the first area, wherein the second area is configured to be deformable into a curved shape while the second housing moves relative to the first housing;
• and
• a multi-bar structure including a plurality of bars and supporting the second area,
• wherein the multi-bar structure includes:
• a support including a first surface, facing the flexible display, to support the second area;
• at least one first guide protrusion protruding from a second surface opposite to the first surface of the support, and
• at least one second guide protrusion extending from the first guide protrusion, and
• wherein while the second housing moves in the first housing, when viewed from outside of the flexible display, the at least one second protrusion is configured to be at least partially disposed to overlap at least portion of the second area.