A wristwatch includes an outer case that comprises an opening portion, a windshield glass disposed in the opening portion, a crown arranged at a side surface of the outer case, a bezel arranged around the windshield glass, a protective member fixed to a side surface at which the crown of the outer case is disposed, wherein the protective member has a notch portion that covers at least a portion of a side surface of the outer case and at least a portion of a side surface of the bezel and exposes the crown.