Abstract: In the missile containing a predeterminate number of swing wings made of a flexible, resiliently elastic, substantially flat material, the substantially flat material contains a closed cavity. Pressurized as can be infed into the closed cavity from a pressurized gas source in the swung out condition of the swing wings. In one embodiment the substantially flat material of the swing wing directly forms the closed cavity. The substantially flat material is made of thin sheet of spring steel. The swing wings are connected at their base to the missile body via respective swivel joints. Each swivel joint comprises a pressurized as cartridge constituting the pressurized gas source for inflating the swing wing. Each swing wing contains two tongue-shaped members of the substantially flat material. The two tongue-shaped members have respective substantially straight base edges and substantially U-shaped external rim portions and are interconnected in the region of their external rim portions.