In a wearable electronic device attachable to an arm, a display screen is disposed on a top face of a main body which is attached to the arm. First and second controls are arranged adjacent to opposite sides of the display screen, respectively, and project obliquely from the top face of the main body. The first control is configured to move toward a near side of the display screen by an operation of the user and to return spontaneously to a rest position away from the near side. The second control is configured to move toward a near side of the display screen by an operation of the user and to return spontaneously to a rest position away from the near side. An operation of one of the first and second controls or both of the first and second controls enables setting of the device using the display screen.