An apparatus for wing unfolding is particularly suited for an airborne vehicle. The apparatus has a base body with a longitudinal axis, a number of moveable flaps, and a number of lateral recesses. Attachment devices are configured for fitting the base body to an end face of a wing, with the one or more moveable flap being formed to influence a drag of the wing. Each lateral recess is designed for self-detachable attachment of the base body to the wing. Furthermore, a folding wing is specified, in particular for an airborne vehicle, having a wing, having a swiveling mechanism for extension of the wing to a limit position, having a wing pocket for holding the wing on the longitudinal side in the retracted state, and having an apparatus, which is arranged at the end, for wing unfolding of the type already known. A flying object, such as a guided missile, has a number of such folding wing assemblies.