A sit-down strike is a labor strike and a form of civil disobedience in which an organized group of workers, usually employed at factories or other centralized locations, take unauthorized or illegal possession of the workplace by "sitting down" at their stations. The attraction for workers of a sit-down strike is that the practice prevents employers from replacing them with strikebreakers or removing equipment to transfer production to other locations. Neal Ascherson has commented that an additional attraction of the practice is that it emphasises the role of workers in providing for the people, and allows workers to in effect hold valuable machinery hostage as a bargaining chip.
Workers have used this technique since the beginning of the 20th century in countries such as United States, Italy, Poland, Yugoslavia, and France. However, sit-down strikes are now uncommon.
The radical syndicalist group Industrial Workers of the World (IWW) were the first American union to use the sit-down strike. On December 10, 1906, at the General Electric Works in Schenectady, New York, 3,000 workers sat down on the job and stopped production to protest the dismissal of three fellow IWW members. The three fired IWW members were ultimately rehired.
The United Auto Workers staged successful sit-down strikes in the 1930s, most famously in the Flint Sit-Down Strike of 1936-1937. In Flint, Michigan, strikers occupied several General Motors plants for more than forty days, and repelled the efforts of the police and National Guard to retake them. A wave of sit-down strikes followed, but diminished by the end of the decade as the courts and the National Labor Relations Board held that sit-down strikes were illegal and sit-down strikers could be fired (see the 1939 Supreme Court ruling in NLRB v. Fansteel Metallurgical Corp.). While some sit-down strikes still occur in the United States, they tend to be spontaneous and short-lived.