A foldable electronic device includes a foldable enclosure including a plurality of sub-enclosures, a hinge coupled to ends of the plurality of sub-enclosures to interconnect the sub-enclosures and to allow the foldable enclosure to be folded or unfolded by rotation of the sub-enclosures, a biaser to apply a rotational force to the hinge in a direction that causes the foldable enclosure to be unfolded, a follower located inside any one of the sub-enclosures and supported for incremental movement during folding or unfolding of the foldable enclosure, a stop to selectively come into contact with or be separated from the follower to selectively restrict the movement of the follower, and an actuator to selectively control folding and unfolding of the foldable electronic device by selectively causing the stop to come into contact with or be separated from the follower.