A wearable electronic device is provided. The wearable electronic device includes a housing, a printed circuit board disposed inside the housing and including wireless communication circuitry and a ground part, and an antenna disposed inside the housing and electrically connected to the wireless communication circuitry, wherein the antenna includes a conductive pattern, a feeding member electrically connected to the wireless communication circuitry through a feeding point and configured to electrically connect a first point of the conductive pattern and a first point of the ground part, a short-circuit member configured to electrically connect a second point of the conductive pattern and a second point of the ground part, and a capacitive loading member disposed between the feeding member and the short-circuit member having a first part operatively coupled to a third point of the conductive pattern and a second part electrically connected to a third point of the ground part.