On the Buses is a 1971 British comedy film directed by Harry Booth and starring Reg Varney and Doris Hare. The film is the first spin-off film from the TV sitcom On the Buses and was followed by two further films, Mutiny on the Buses (1972) and Holiday on the Buses (1973). The films are set within a slightly different canon from the TV series: Stan and Jack work for a different bus company (Town & District instead of Luxton & District), and the three films form a loose story arc where Arthur and Olive become parents (despite their apparently sexless marriage).

The film was produced by Ronald Chesney and Ronald Wolfe for Hammer Films, and enjoyed major success in Britain, outdoing Diamonds Are Forever to become the highest-grossing film of 1971. The tongue-in-cheek lyrics to the "On The Buses" theme song were written by Roger Ferris, who produced the recording at Abbey Road Studios. Quinceharmon's fine vocal performance secured a release on EMI's Columbia label.