Saturnia pyri, the Giant Peacock Moth, is a Saturniid moth which is native to Europe. It is the largest European Moth and is also called as the Great Peacock Moth, Giant Emperor Moth or Viennese Emperor.

In French it is called Grand paon de nuit.

The Giant Peacock Moth has a range that includes the Iberian Peninsula, southern France and Italy and extends into Siberia and north Africa. It is absent from the UK.