A wing includes: a main structural member; a leading-edge member formed of material with a coefficient of linear thermal expansion different from that of material of the main structural member; an eccentric bushing that has a circular through-hole and is shaped in a cylindrical shape; and a coupling member. The leading-edge member has a first hole prolonged in a specific direction. The main structural member has a second hole. The center axis of the eccentric bushing and the center axis of the through-hole are parallel to and offset from each other. The eccentric bushing is inserted to the first hole. The first coupling member is inserted to the through-hole and the second hole to couple the main structural member and the leading-edge member.