An automotive double folding tailgate constructed to doubly fold a lid panel and a glass to position same toward floor of automobile body enabling to make a cargo loading space available, the tailgate comprising: a lid panel supported on a floor of automobile body via a pivot unit, and a glass foldable at a lower end thereof via a folding unit mounted at an upper part of the lid panel and releasably mounted to a roof panel at an upper end thereof via a locking unit.