According to an embodiment of the disclosure, an electronic device comprises a first housing structure; and a second housing structure hingedly connected to the first housing structure along a hinge axis, wherein a first surface of the first housing structure faces a first surface of the second housing structure in a folded configuration of the electronic device, and the first surface of the first housing structure and the first surface of the second housing structure are planar in an unfolded configuration of the electronic device; a first display disposed on the first surface of the first housing structure and the first surface of the second housing structure, and bendable about the hinge axis; and a sliding structure retractably disposed in the first housing structure, configured to protrude to the outside of the first housing structure in a direction substantially co-planar to the first surface of the first housing structure, the sliding structure comprising at least one optical input module facing a direction substantially orthogonal to the first surface.