Hinge structure and electronic device including same

A hinge structure for a foldable electronic device is disclosed. The hinge structure may include a fixing structure including an arc-shaped first guide rail and an arc-shaped second guide rail, a center of an arc of the first guide rail being a first rotation axis parallel to an axial direction, and a center of an arc of the second guide rail being a second rotation axis parallel to the axial direction; a first rotating structure including a first guide portion accommodated in the first guide rail and a first spiral groove spirally extending around a first rotating shaft about which the first rotating structure rotates; a second rotating structure including a second guide portion accommodated in the second guide rail and a second spiral groove spirally extending around a second rotating shaft, the second rotating structure rotating around the second rotating shaft; and a sliding structure including a first guide protrusion accommodated in the first spiral groove and a second guide protrusion accommodated in t