Dual slidable electronic device

An electronic device comprising:

• a housing surrounding at least a side surface of the electronic device;
• a flexible display exposed through a first surface of the electronic device which faces a first direction, an exposed area of the flexible display varying based on movement of the housing;
• and
• a flexible material exposed through a second surface of the electronic device which faces a second direction opposite to the first direction, an exposed area of the flexible material configured to vary based on the movement of the housing,
• wherein a width of the flexible material expands in a fourth direction substantially opposite to a third direction in accordance with an expansion of the width of the flexible display in the third direction, the third direction and the fourth direction being substantially perpendicular to the first direction and the second direction, and
• wherein the housing includes:
• a side member including a first side member and a second side member facing each other;
• and
• a side cover encasing the side member at the outside, and
• wherein the side cover includes;
• a first side cover forming a first side surface of the electronic device;
• a second side cover forming a second surface of the electronic device facing the first side surface;
• a third side cover which forms a third side surface connecting one side of the first side surface and one side of the second side surface, and a length of which expands in the third direction or contracts in a fourth direction;
• and
• a fourth side cover which forms a fourth side surface of the electronic device facing the third side cover and expands or contracts in a direction identical to the direction in which the third side cover moves.