The bathing machine was a device, popular in the 18th and 19th centuries, to allow people to change out of their usual clothes, possibly change into swimwear and then wade in the ocean at beaches. Bathing machines were roofed and walled wooden carts rolled into the sea. Some had solid wooden walls; others had canvas walls over a wooden frame.
According to some sources, the bathing machine was developed in 1750 in Margate, Kent, though this may relate primarily to the "modesty hood" (bathing costumes were not yet common and most people bathed naked).
Bathing machines were most common in the United Kingdom and parts of the British Empire with a British population, but were also used in France, Germany, the United States, Mexico, and other nations. Legal segregation of bathing areas in Britain ended in 1901, and the bathing machine declined rapidly. By the start of the 1920s bathing machines were almost extinct, even on beaches catering to an older clientele.
The bathing machines remained in active use on English beaches until the 1890s, when they began to be parked on the beach. They were then used as stationary changing rooms for a number of years. Most of them had disappeared in the United Kingdom by 1914.