The '?' Motorist is a 1906 British silent comedy trick film, commonly called "The Mad Motorist" or "Questionmark Motorist" and directed by Walter R. Booth. Released in October 1906, the film is "one of the last films that W.R. Booth made for the producer-inventor R.W. Paul," and, according to Michael Brooke of BFI Screenonline, "looks forward to the more elaborate fantasies that Booth would make for Charles Urban between 1907 and 1911, as well as drawing on a wide range of the visual tricks that Booth had developed over the preceding half-decade."

Booth later remade the film as The Automatic Motorist in 1911. The film has also been compared to the work of Georges Méliès and "The Impossible Voyage."