Abstract: An example wearable electronic device may include a main body including a first surface having an opening area formed therein, wherein a plurality of lateral walls, surrounding at least one part of the opening area, are formed in the peripheral area of the opening area; a display disposed inside the main body and which is viewable through the opening area; a wheel including a mounted part, which is at least partially mounted on the peripheral area, and an extension part which extends in the inward direction from the mounted part, wherein the wheel is formed in a ring shape extending in the circumferential direction with respect to a rotation axis of the wheel; and a guide member partially coming into contact with the main body and the wheel, respectively, and for guiding the rotation of the wheel.