The Adventures of Prince Achmed (German: Die Abenteuer des Prinzen Achmed) is a 1926 German animated fairytale film by Lotte Reiniger. It is the oldest surviving animated feature film. (Two earlier ones had been made in Argentina by Quirino Cristiani, but they are considered to be lost.) The Adventures of Prince Achmed features a silhouette animation technique Reiniger had invented that involved manipulated cutouts made from cardboard and thin sheets of lead under a camera. The technique she used for the camera is similar to Wayang shadow puppets, though hers were animated frame by frame, not manipulated in live action. The original prints featured color tinting. Reiniger also used the first form of a multiplane camera in making the film, one of the most important devices in pre digital animation.

Several famous avant-garde animators worked on this film with Lotte Reiniger, among them Walter Ruttmann, Berthold Bartosch, and Carl Koch.

The story is based on elements from the One Thousand and One Nights written by Hanna Diyab, including "Aladdin," "The Story of Prince Ahmed and the Fairy Perī-Bānū", and "The Ebony Horse."